The main point of enlightenment is man's release from his self-caused immaturity, primarily in matters of religion. - Immanuel Kant

Enlightenment is man's emergence from his self-incurred immaturity.

I do not say that things in themselves possess a quantity, that their reality possesses a degree, their existence a connection of accidents in a substance, etc. This nobody can prove, because such a synthetic connection from mere concepts, without any reference to sensuous intuition on the one side or connection of such intuition in a possible experience on the other, is absolutely impossible.

Es ist überall nichts in der Welt, ja überhaupt auch außer derselben zu denken möglich, was ohne Einschränkung für gut könnte gehalten werden, als allein ein guter Wille.

There is nothing at all in the world that one can think of, or even out of it, that can be held good without qualification, except a good will. (Ch. 1)