Always follow these two rules: first, act only on what your reasoning mind proposes for the good of humanity, and second, change your opinion if someone shows you it's wrong. This change of mind must proceed only from the conviction that it's both correct and for the common good, but not because it will give you pleasure and make you popular.

How many after being celebrated by fame have been given up to oblivion; and how many who have celebrated the fame of others have long been dead.

Hast thou reason? I have. Why then dost not thou use it? For if this does its own work, what else dost thou wish?

If anyone can refute me-show me I'm making a mistake or looking at things from the wrong perspective-I'l l gladly change. It's the truth I'm after, and the truth never harmed anyone. What harms us is to persist in self-deceit and ignorance.

The best revenge is not to be like your enemy.

Gluttony and drunkenness have two evils attendant on them; they make the carcass smart, as well as the pocket.

Time is a sort of river of passing events, and strong is its current; no sooner is a thing brought to sight than it is swept by and another takes its place, and this too will be swept away.