It is so easy to be immature. If I have a book to serve as my understanding, a pastor to serve as my conscience, a physician to determine my diet for… - Immanuel Kant

If I have a book that thinks for me, a pastor who acts as my conscience, a physician who prescribes my diet, and so on... then I have no need to exert myself. I have no need to think, if only I can pay; others will take care of that disagreeable business for me.

"Know your heart - whether it is good or evil, whether the source of your actions is pure or impure. Know what can be imputed to you and what belongs to your moral state, whether as something inherent in man's substance or as something derived (acquired or admitted).
Moral self-knowledge, which requires one to penetrate into the unfathomable depths and abyss of one's heart, is the beginning of all human wisdom. For wisdom consists in the harmony of the will of a being with his final end, and in the case of man this requires him first to remove the inner obstacle (an evil will actually present in him) and then to develop his inalienable and inherent disposition of a good will. "Only the descent into the hell of self-knowledge can pave the way to deification.

...When he puts a thing on a pedestal and calls it beautiful, he demands the same delight from others. He judges not merely for himself, but for all men, and then speaks of beauty as if it were the property of things.

...[F]reedom... is a property of all rational beings.