He has great tranquility of heart who cares neither for the praises nor the fault-finding of men.

France is a country that loves to change their government if it is always the same.

Virtue is not a thing you can have by halves; it is or it is not.

Most geometricians, chemists, mathematicians, and great scientists submit religion to reason only to discover a problem as unsolvable as that of squaring a circle.

A man may and ought to pride himself more on his will than on his talent.

It is not hope but despair that gives us the measure of our ambitions. We may yield secretly to beautiful poems of hope but grief looms start and stripped of all veils.

Your modest savant smiles as he says to his admirers: What have I done? Nothing. Man does not invent a force, he directs it.