Religion is based on faith alone, and faith stands in no need of logical demonstrations, but is itself justified in postulating its content as a necessary hypothesis.
I have therefore found it necessary to deny knowledge in order to make room for faith. Critique of Pure Reason (1781)
Enlightenment is man’s emergence from his self-imposed immaturity. Immaturity is the inability to use one’s understanding without guidance from another. This immaturity is self-imposed when its cause lies not in lack of understanding, but in lack of resolve and courage to use it without guidance from another. What is Enlightenment? (1784)