All silencing of discussion is an assumption of infallibility.

Money is a machine for doing quickly and commodiously what would be done, though less quickly and commodiously, without it.

A person's taste is as much his own peculiar concern as his opinion or his purse.

The study of science teaches young men to think, while study of the classics teaches them to express thought.

Over one's mind and over one's body the individual is sovereign.

Human nature is not a machine to be built after a model, and set to do exactly the work prescribed for it, but a tree, which requires to grow and develop itself on all sides, according to the tendency of the inward forces which make it a living thing.

A profound conviction raises a man above the feeling of ridicule.