Lucretius In philosophy all truth is old, and only error is original. What increases with civilization is not so much immorality of intent as opportunity of expression. Religion is indispensable to private morals and public order, and no man of sense would attack it. Laws are vain when hearts are unchanged. The first lesson of philosophy is that we cannot be wise about everything.
Men begin by seeking happiness and are content at last with peace.
The spirit cannot mature into unity unless it has checked its curiosity and its wanderings. The primary sign of a well-ordered mind is a man's ability to remain in one place and linger in his own company.