From a spiritual perspective- narcissism (narcissistic personality disorder) and psychopathy/sociopathy (antisocial personality disorder) can be features of demonic possession (refer to the link- Demon Possession)
This article (Characteristics of Psychopaths) has a good list of Satan's characteristics (the father of sociopathy/psychopathy) passed on to his children (those that reject the power of godliness and refuse to be transformed by God) who thereby inherit sociopathy/psychopathy from their true spiritual father- the devil. Satan himself is a narcissistic sociopath.
Remember to recognize the 5 main tactics of narcissistic sociopaths against you:
John 8:44-47 (NLT):
"For you are the children of your father the devil, and you love to do the evil things he does. He was a murderer from the beginning. He has always hated the truth, because there is no truth in him. When he lies, it is consistent with his character; for he is a liar and the father of lies. 45 So when I tell the truth, you just naturally don’t believe me! 46 Which of you can truthfully accuse me of sin? And since I am telling you the truth, why don’t you believe me? 47 Anyone who belongs to God listens gladly to the words of God. But you don’t listen because you don’t belong to God.”
Acts 13:6-12 (NIV):
"They traveled through the whole island until they came to Paphos. There they met a Jewish sorcerer and false prophet named Bar-Jesus, 7 who was an attendant of the proconsul, Sergius Paulus. The proconsul, an intelligent man, sent for Barnabas and Saul because he wanted to hear the word of God. 8 But Elymas the sorcerer (for that is what his name means) opposed them and tried to turn the proconsul from the faith. 9 Then Saul, who was also called Paul, filled with the Holy Spirit, looked straight at Elymas and said, 10 “You are a child of the devil and an enemy of everything that is right! You are full of all kinds of deceit and trickery. Will you never stop perverting the right ways of the Lord? 11 Now the hand of the Lord is against you. You are going to be blind for a time, not even able to see the light of the sun.” Immediately mist and darkness came over him, and he groped about, seeking someone to lead him by the hand. 12 When the proconsul saw what had happened, he believed, for he was amazed at the teaching about the Lord."
1 John 3:4-10 (NLT):
"Everyone who sins is breaking God’s law, for all sin is contrary to the law of God. 5 And you know that Jesus came to take away our sins, and there is no sin in him. 6 Anyone who continues to live in him will not sin. But anyone who keeps on sinning does not know him or understand who he is. 7 Dear children, don’t let anyone deceive you about this: When people do what is right, it shows that they are righteous, even as Christ is righteous. 8 But when people keep on sinning, it shows that they belong to the devil, who has been sinning since the beginning. But the Son of God came to destroy the works of the devil. 9 Those who have been born into God’s family do not make a practice of sinning, because God’s life is in them. So they can’t keep on sinning, because they are children of God. 10 So now we can tell who are children of God and who are children of the devil. Anyone who does not live righteously and does not love other believers does not belong to God."
2 Timothy 3:1-9 (authorized KJV) is a perfect description of narcissistic sociopaths (who profess to be Christians) and how genuine Christians should stay away from such fake Christians:
"This know also, that in the last days perilous times shall come. 2 For men shall be lovers of their own selves, covetous, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy, 3 without natural affection, trucebreakers, false accusers, incontinent, fierce, despisers of those that are good, 4 traitors, heady, highminded, lovers of pleasures more than lovers of God; 5 having a form of godliness, but denying the power thereof: from such turn away. 6 For of this sort are they which creep into houses, and lead captive silly women laden with sins, led away with divers lusts, 7 ever learning, and never able to come to the knowledge of the truth. 8 Now as Jannes and Jambres withstood Moses, so do these also resist the truth: men of corrupt minds, reprobate concerning the faith. 9 But they shall proceed no further: for their folly shall be manifest unto all men, as theirs also was."
Demon possession is a major problem for both "professing Christians" (who are actually fake Christians/carnal Christians as evidenced by their behavior) and also non-Christians. From my own observations, I think India's idolatrous and pagan influenced environment is a breeding ground for demonic possession (not trying to offend anyone, but unfortunately, the truth when presented can be harsh. My hope is that all people will realize the truth and be saved from demonic possession and enslavement to sin). This observation is also based on what the Bible teaches against idolatry and pagan practices in Romans 1:18-32.
You can observe that many people in the Indian community are narcissistic sociopaths (these are the type of people who are experts at waging a psychological warfare against your mind in order to weaken it through the things they say and do against you. They can cause you to have a psychological breakdown) in both Christians and non-Christians (ranging from famous/popular people like celebrities and politicians to ordinary citizens around you that you come across in all walks of life. They can also be people that you are close to- like friends, classmates, co-workers, relatives, parents, siblings, spouse, etc. In other words, all you have to do is look at people around you). Of course, the same can be said of Americans, people from other Western countries, other Asians, and people from other countries and cultures.
Nevertheless, when you couple this with a false gospel message (faith alone being propagated instead of faith being coupled with genuine repentance and metanoia), being propagated to people in such areas, it's a synergistic effect (demon possessed people are presented with a false gospel message and no spiritual transformation takes place). You get a result of "professing" Christians who are not genuinely born again (spiritually transformed/regenerated) and instead possessed by demons as evidenced by their behavior (you see things like narcissism, sociopathy/psychopathy along with other evil behavior). The same thing has been happening in America and other nations also. Worldwide, particular groups in Christianity have been infiltrated by Satan and Satan is propagating his gospel to deceive and entrap many people (keep people enslaved in sin). (For further reference for understanding the problem with a false gospel being spread through particular groups in Christianity, you can refer to the following links:
(1). "The Psychology of Salvation: Recovering, Reframing, and Reclaiming the Early Quaker Experience"
(2). "Cognitive Dissonance: The Body of Christ and it's Response"
Such people need to get the demons cast out of them by true, Spirit filled servants of God (those who have a genuine faith in Christ and those who believe that they can do the impossible/miracles through the power of Christ working through them. It's all about having faith. For with faith, all things are possible as Jesus says in Mark 9:23. Lack of faith robs you of power. Even when demons are not able to be cast out the first time around, such servants of God will not give up and persist through prayer and fasting as can be seen in Mark 9:29 (authorized KJV). At the same time, on the part of those who are afflicted, a lack of faith in God and persistence in sin can be roadblocks to deliverance and healing.)- just like how it was done during the days of the early Church. They must also genuinely repent and prove their repentance through the demonstration of good deeds (refer to Acts 26:20), asides from putting their faith in Christ.
Today's false teachers among Christians (agents of Satan), especially cessationists, are not the people to be consulted for that as they will negate the need for that as Satan doesn't want to lose anyone from his mind controlling grasp. For even in Mark 16:17-18 (NLT), Jesus says, "These miraculous signs will accompany THOSE WHO BELIEVE: They will cast out demons in my name, and they will speak in new languages. 18 They will be able to handle snakes with safety, and if they drink anything poisonous, it won’t hurt them. They will be able to place their hands on the sick, and they will be healed.”
Point numbers 8 and 26 (given in the article above- "Characteristics of Psychopaths") are spot on as I've observed them in sociopaths that I've encountered also, along with most of the other points.
(8). Glares at people with piercing eyes. (Trying to study them to figure out their weaknesses)
(26). Makes an audible noise when walking around, such as humming, whistling, singing,......"
Even sexual immorality (fornication, adultery, and other lustful desires) has an underlying demonic influence. In Hosea 4, the Bible teaches how an evil demonic "spirit of prostitution" was leading the Israelites astray into committing sins like idolatry and sexual immorality.
Hosea 4:10-14 (NIV):
“They will eat but not have enough; they will engage in prostitution but not flourish, because they have deserted the Lord to give themselves 11 to prostitution; old wine and new wine take away their understanding. 12 My people consult a wooden idol, and a diviner’s rod speaks to them. A spirit of prostitution leads them astray; they are unfaithful to their God. 13 They sacrifice on the mountaintops and burn offerings on the hills, under oak, poplar and terebinth, where the shade is pleasant. Therefore your daughters turn to prostitution and your daughters-in-law to adultery. 14 “I will not punish your daughters when they turn to prostitution, nor your daughters-in-law when they commit adultery, because the men themselves consort with harlots
and sacrifice with shrine prostitutes— a people without understanding will come to ruin!"
Being filled/possessed by demons has a huge contrast with being filled by the Holy Ghost (God's Spirit). When you are filled by God's Spirit and led by Him, you produce godly characteristics in your life (you are no longer a narcissist nor a sociopath/psychopath).
Galatians 5:16-26 (NLT):
"So I say, let the Holy Spirit guide your lives. Then you won’t be doing what your sinful nature craves. 17 The sinful nature wants to do evil, which is just the opposite of what the Spirit wants. And the Spirit gives us desires that are the opposite of what the sinful nature desires. These two forces are constantly fighting each other, so you are not free to carry out your good intentions. 18 But when you are directed by the Spirit, you are not under obligation to the law of Moses. 19 When you follow the desires of your sinful nature, the results are very clear: sexual immorality, impurity, lustful pleasures, 20 idolatry, sorcery, hostility, quarreling, jealousy, outbursts of anger, selfish ambition, dissension, division, 21 envy, drunkenness, wild parties, and other sins like these. Let me tell you again, as I have before, that anyone living that sort of life will not inherit the Kingdom of God.
22 But the Holy Spirit produces this kind of fruit in our lives: love, joy, peace, patience, kindness, goodness, faithfulness, 23 gentleness, and self-control. There is no law against these things!
24 Those who belong to Christ Jesus have nailed the passions and desires of their sinful nature to his cross and crucified them there. 25 Since we are living by the Spirit, let us follow the Spirit’s leading in every part of our lives. 26 Let us not become conceited, or provoke one another, or be jealous of one another."
Be aware of tactics used by sociopaths like- "gaslighting" and "love bombing." Just google these terms and read more about them. If you ever confront them about their abusive behavior, they will use the above tactics mentioned. It's their way of engaging in psychological warfare- to psychologically disorient you and make you doubt your own moral judgment regarding their offenses against you.
Be aware of sociopathic sexual perverts/predators also. I've heard that many sociopaths have the tendency to be supposedly neither gay nor straight- i.e. they will have sex with anyone for their own perverted purposes and desires (refer to "Sociopaths, Sex, Power, and Control"). I've heard of these type of sociopaths who try to befriend people by acting straight (they show their desire for the opposite sex), but are actually sex predators seeking to destroy anyone regardless of their gender. It's only when people (both males and females) get sexually assaulted by them that they see what kind of wolves they really are. One of my friends got molested by such perverted sociopaths. He told me how he developed OCD to wash himself whenever he was tormented by his past trauma (PTSD). I felt that from a spiritual perspective, it could be demons tormenting his mind to do such things (making him feel unclean and then to alleviate by washing himself). I think this same friend of mine was also exposed to unclean spirits from one of his classmates. His classmate used to spit indoors, even on the carpet, for no reason. Eventually, this habit caught on to my friend for some time also. Thus, I believe demonic oppression/possession is very real and overlooked in many areas.
For those who have been hurt by such perverted sociopaths, I just want to give you a verse of encouragement regarding how you will eventually get justice from God. I also wanted to give you a song of encouragement which promises you healing from God.
1 Corinthians 3:17 (NLT):
"God will destroy anyone who destroys this temple. For God's temple is holy, and you are that temple."
I came across a clip on Youtube (refer to "Putin's Missile command center surprises the world") in which it shows Angela Merkel (the Chancellor of Germany) not shaking Narendra Modi's (the Prime Minister of India) hand in public. I thought that looked terrible on her part. It's funny how even politicians make themselves look bad in a public setting like that in front of the whole world. I think regular people (those not in political power) also face such things everyday. You'll come across haters and those who don't want to interact with you out of their contempt for you. They're known as narcissistic sociopaths (both narcissism and sociopathy are mental disorders). The Bible teaches that such people are the children of the devil (refer to John 8:34-47 and 1 John 3:3-19). I've learned that the best thing to do is stay away from such people (refer to 2 Timothy 3:5). If a person hates you, doesn't want to interact with you and moreover wants to humiliate you, that person has psychological issues. Learn to see them as psychologically abnormal. When you learn to see such offenders as mental people, you can laugh it off and go your way peacefully instead of letting their hatred and anger towards you permeate you, and make you just like them.
Further references regarding narcissistic sociopaths (just click on the links)-
(1). "Do you live with a psychopath?"
(2). "How to deal with a psychopath"
(3). "When a Christian meets a sociopath"
(4). "FAQ about abusive, narcissistic, and psychopathic relatives"
(5). "The Psychopath's Brain- Tormented Souls, Diseased Brains"