"A certain proof that men ever did, and ever will derive their religion from other sources than this species of reasoning."

"The most perfect happiness consists in the most perfect activity."

"The general maxims of morality are insufficient to determine us to action."

"The most perfect philosophy of the natural kind only staves off our ignorance a little longer."

"It is not from the benevolence of the butcher, the brewer, or the baker, that we expect our dinner, but from their regard to their own interest."