They knew no better, but I do not propose to follow the example of a barbarian because he was honestly a barbarian.

When I became convinced that the universe is natural, that all the ghosts and gods are myths, there entered into my brain, into my soul, into every drop of my blood the sense, the feeling, the joy of freedom. The walls of my prison crumbled and fell. The dungeon was flooded with light and all the bolts and bars and manacles became dust.

The combined wisdom and genius of all mankind cannot possibly conceive of an argument against liberty of thought.

Music expresses feeling and thought, without language; it was below and before speech, and it is above and beyond all words.

A man is not moral because he is obedient through fear or ignorance. Morality lives in the realm of perceived obligation.

I would have all the professors in colleges, all the teachers in schools of every kind, including those in Sunday schools, agree that they would teach only what they know, that they would not palm off guesses as demonstrated truths.

As more people become more intelligent they care less for preachers and more for teachers.