Enlightenment is man's emergence from his self-imposed nonage. Nonage is the inability to use one's own understanding without another's guidance. This nonage is self-imposed if its cause lies not in lack of understanding but in indecision and lack of courage to use one's own mind without another's guidance. Dare to know!
We need the iron qualities that go with true manhood. We need the positive virtues of resolution, of courage, of indomitable will, of power to do without shrinking the rough work that must always be done.
Playing the part of a charitable soul was only for those who were afraid of taking a stand in life. It is always far easier to have faith in your own goodness than to confront others and fight for your rights. It is always easier to hear an insult and not retaliate than have the courage to fight back against someone stronger than yourself; we can always say we're not hurt by the stones others throw at us, and it's only at night - when we're alone and our wife or our husband or our school friend is asleep - that we can silently grieve over our own cowardice.