» To know what people really think, pay regard to what they do, rather than what they say.
» The reading of all good books is like a conversation with all the finest men of past centuries.
» Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has.
» If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.
» Whenever anyone has offended me, I try to raise my soul so high that the offense cannot reach it.
» It is not enough to have a good mind, the main thing is to use it well.
» There is nothing so strange and so unbelievable that it has not been said by one philosopher or another.
» Everything is self-evident.
» Divide each difficulty into as many parts as is feasible and necessary to resolve it.
» Except our own thoughts, there is nothing absolutely in our power.