"I detest the great, their condition, their maxims, their vices, and I should detest them still more if I were one of them."

"No man has any natural authority over his fellow men."

"The child who has learned only what is taught him by others, will never be truly learned."

"It is an error to distinguish the moral from the physical in man."

"The most useful and honorable science is that of man; the most useful book, the one that makes us know ourselves."