Girls must be thwarted early in life.

Our affections as well as our bodies are in perpetual flux.

Leave those vain moralists, my friend, and return to the depth of your soul: that is where you will always rediscover the source of the sacred fire which so often inflamed us with love of the sublime virtues; that is where you will see the eternal image of true beauty, the contemplation of which inspires us with a holy enthusiasm.

Since men cannot create new forces, but merely combine and control those which already exist, the only way in which they can preserve themselves is by uniting their separate powers in a combination strong enough to overcome any resistance, uniting them so that their powers are directed by a single motive and act in concert.

Two things, almost incompatible, are united in me in a manner which I am unable to understand: a very ardent temperament, lively and tumultuous passions, and, at the same time, slowly developed and confused ideas, which never present themselves until it is too late. One might say that my heart and my mind do not belong to the same person.

Equality, because without it there can be no liberty.

The social compact sets up among the citizens as equality of such kind, that they all bind themselves to observe the same conditions and should therefore all enjoy the same rights.