Revelation I received from asking few weeks ago

We are admonished in our Scriptures: “Test yourselves to see whether you are in the faith” (2 Cor. 13:5). We are to courageously look at our lives and ask some tough questions. γνῶθι σεαυτόν: “Know yourself.” Do you really believe the truth, or are there other motives at work? Is it possible to think that you really believe when in fact you don’t? For example, is it possible to think that you are a spiritual person who serves God, but you are mistaken? Tragically it seems that we can “talk ourselves into” believing that we are moral, honest, full of faith, and so on, but our self image does not agree with reality... This is a more serious problem than hypocrisy (not believing what we say), since in this case we really do believe that we are something we are not – we are “true believers” in a distorted view of ourselves! This happens all the time. Most people think they are “above average” and have a high opinion of themselves. Self esteem is important, of course, but it must be grounded in reality: “For if anyone thinks he is something, when he is nothing, he deceives himself” (Gal. 6:3). Jesus warned, "On that day many (πολλοὶ) will profess to me, 'Lord, Lord, did we not prophesy in your name, and cast out demons in your name, and do many mighty works in your name?' And then will I profess to them, 'I never knew you; depart from me, you workers of lawlessness'” (Matt. 7:22-23). How is such a dreadful outcome possible unless truly religious people can indeed truly fool themselves? By itself, sincerity is no measure of truth, since we can truly sincere, and yet sincerely wrong... [Hebrew for Christians]