"When a man's discourse beginneth not with definitions, it is a sign that he gropes in the dark."

"And therefore, if a man consider that argument, which is drawn from the common consent of all nations, to prove there is a God; he must not think it an argument of God's existence, but of the existenc…"

"For the laws of nature, as I have shewed, are but theorems concerning what conduceth to the conservation and defence of themselves."

"Science is the knowledge of consequences, and dependence of one fact upon another."

"For there is no such thing as perpetual tranquility of mind, while we live here; because life itself is but motion, and can never be without desire, nor without fear, no more than without sense."