So you see that the issue of truth is an issue of the heart before it is an issue of the head. When the heart is in love with self-exaltation and independence and the pleasures of sin, the mind will inevitably distort the truth or suppress the truth in order to protect the idols of the heart. What is needed is not just new ideas or more information, but a new heart. And a new set of passions and desires and pleasures. You are going to hear the same analysis of our sinful hearts and why they suppress the truth of God.
People love darkness.
Jesus said it is because their deeds are evil. That is, they are unrighteous. Light and truth would expose that. Darkness conceals it. Therefore we suppress the truth and so protect the ugliness of our desires with darkness.