Socrates

Be kind, for everyone you meet is fighting a hard battle.

Smart people learn from everything and everyone, average people from their experiences, stupid people already have all the answers.

Thou shouldst eat to live; not live to eat.

Be nicer than necessary to everyone you meet. Everyone is fighting some kind of battle.

My advice to you is get married: if you find a good wife you'll be happy; if not, you'll become a philosopher.

An unexamined life is not worth living.

The unexamined life is not worth living.

Bad company corrupts good character.

I know that I am intelligent, because I know that I know nothing.

I decided that it was not wisdom that enabled poets to write their poetry, but a kind of instinct or inspiration, such as you find in seers and prophets who deliver all their sublime messages without knowing in the least what they mean.

Beauty is a short-lived tyranny.

He is a man of courage who does not run away, but remains at his post and fights against the enemy.

Not life, but good life, is to be chiefly valued.

The greatest way to live with honor in this world is to be what we pretend to be.

Be slow to fall into friendship; but when thou art in, continue firm and constant.

The only true wisdom is in knowing you know nothing.

He is richest who is content with the least, for content is the wealth of nature.

To know, is to know that you know nothing. That is the meaning of true knowledge.

The only thing I know is that I know nothing.

There is only one good, knowledge, and only one evil, ignorance.

I cannot teach anybody anything. I can only make them think.

No one knows whether death, which people fear to be the greatest evil, may not be the greatest good.

By all means marry; if you get a good wife, you'll be happy. If you get a bad one, you'll become a philosopher.