Death pays all debts.

Any time and any place can be used to study: his room, a garden, is table, his bed; when alone or in company; morning and evening. His chief study will be Philosophy, that Former of good judgement and character who is privileged to be concerned with everything.

Ceremony forbids us to express by words things that are lawful and natural, and we obey it; reason forbids us to do things unlawful and ill, and nobody obeys it.

I enter into discussion and argument with great freedom and ease, inasmuch as opinion finds me in a bad soil to penetrate and take deep root in. No propositions astonish me, no belief offends me, whatever contrast it offers to my own. There is no fancy so frivolous and so extravagant that it does not seem to me quite suitable to the production of the human mind.

There is no greater enemy to those who would please than expectation.

A little of everything and nothing thoroughly, after the French fashion.

The common notions that we find in credit around us and infused into our souls by our fathers' seed, these seem to be the universal and natural ones. Whence it comes to pass that what is off the hinges of custom, people believe to be off the hinges of reason.