"The science of every man's duty, which is called ethics, is nothing else but the knowledge of what is good and evil in the actions of men."

"The value, or worth of a man, is as of all other things, his price; that is to say, so much as would be given for the use of his power: and therefore is not absolute; but a thing dependant on the need…"

"Leisure is the mother of Philosophy."

"The right of nature, which writers commonly call Jus Naturale, is the liberty each man hath, to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his ow…"

"The greatest good is the greatest evil: or rather, the greatest evil is that which is most destructive of life."