Whatever necessity lays upon thee, endure; whatever she commands, do.

In all times it is only individuals that have advanced science, not the age.

Freedom consists not in refusing to recognize anything above us, but in respecting something which is above us; for by respecting it, we raise ourselves to it, and, by our very acknowledgment, prove that we bear within ourselves what is higher, and are worthy to be on a level with it.

Aptitudes are assumed, they should become accomplishments. That is the purpose of all education.

The greatest act of faith takes place when a man finally decides that he is not God.

Each one of us must carry within the proof of immortality, it cannot be given from outside of us. To be sure, everything in natureis change but behind the change there is something eternal.

The best slave is the one who thinks he is free.