Presence of mind, penetration, fine observation, are the sciences of women; ability to avail themselves of these is their talent.

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

Interest is the spur of the people, but glory that of great souls.

The social pact, far from destroying natural equality, substitutes, on the contrary, a moral and lawful equality for whatever physical inequality that nature may have imposed on mankind; so that however unequal in strength and intelligence, men become equal by covenant and by right.

The tone of good conversation is brilliant and natural; it is neither tedious nor frivolous; it is instructive without pedantry, gay without tumultuousness, polished without affectation, gallant without insipidity, waggish without equivocation.

The first step towards vice is to shroud innocent actions in mystery, and whoever likes to conceal something sooner or later has reason to conceal it.

I love idleness. I love to busy myself about trifles, to begin a hundred things and not finish one of them, to come and go as my fancy bids me, to change my plan every moment, to follow a fly in all its circlings, to try and uproot a rock to see what is underneath, eagerly to begin a ten-years' task to give it up after ten minutes: in short, to fritter away the whole day inconsequentially and incoherently, and to follow nothing but the whim of the moment.