The greatest evil that fortune can bring to men is to endow them with feeble resources and yet to make them ambitious.
Jealousy is the paralysis of love.
To execute great things, one should live as though one would never die.
Indolence is the sleep of the mind.
A new principle is an inexhaustible source of new views.
When we feel that we lack whatever is needed to secure someone else's esteem, we are very close to hating him