"The only way to make a man trustworthy is to trust him."

"All our ideas are nothing but copies of our impressions, or, in other words, that it is impossible for us to think of anything, which we have not antecedently felt, either by our external or internal …"

"To be a philosophical sceptic is, in a man of letters, the first and most essential step towards being a true philosopher."

"The most perfect politician, who has ever existed, is he who has been able to unite the most opposite qualities, and to reconcile the most contradictory interests."

"The passion of love is a very odd compound."