All the ways of a man are clean and right in his own eyes. Yet that does not excuse his faults in God's eyes. God understands your thoughts, motives, and the desires of your heart much better than you do. So much the more reason is there for anxious self-examination and testing the conduct by God's word, and, when this has been done to the best of our ability, still to pray for cleansing from faults which have escaped our notice. For God shall bring every work into judgment, with every secret thing, whether it be good, or whether it be evil.
The heart is deceitful above all things, and desperately sick; who can understand it? "I the LORD search the heart and test the mind, to give every man according to his ways, according to the fruit of his deeds." (Jeremiah 17:9-10 ESV)
It is no wonder that dark occultists have great influence in the world, for the whole world lies in the power of Satan (temporarily).
We know that everyone who has been born of God does not keep on sinning, but he who was born of God protects him, and the evil one does not touch him. We know that we are from God, and the whole world lies in the power of the evil one. And we know that the Son of God has come and has given us understanding, so that we may know him who is true; and we are in him who is true, in his Son Jesus Christ. He is the true God and eternal life. (1 John 5:18-20 ESV)
But understand this, that in the last days there will come times of difficulty. For people will be lovers of self, lovers of money, proud, arrogant, abusive, disobedient to their parents, ungrateful, unholy, heartless, unappeasable, slanderous, without self-control, brutal, not loving good, treacherous, reckless, swollen with conceit, lovers of pleasure rather than lovers of God, having the appearance of godliness, but denying its power. Avoid such people. For among them are those who creep into households and capture weak women, burdened with sins and led astray by various passions, always learning and never able to arrive at a knowledge of the truth. Just as Jannes and Jambres opposed Moses, so these men also oppose the truth, men corrupted in mind and disqualified regarding the faith. But they will not get very far, for their folly will be plain to all, as was that of those two men. (2 Timothy 3:1-9 ESV)