Socrates

The unexamined life is not worth living.

I know that I know nothing.

The only true wisdom is in knowing you know nothing.

Wonder is the feeling of a philosopher, and philosophy begins in wonder.

I am not an Athenian or a Greek, but a citizen of the world.

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

Strong minds discuss ideas, average minds discuss events, weak minds discuss people.

Education is the kindling of a flame, not the filling of a vessel.

It would be better for me... that multitudes of men should disagree with me rather than that I, being one, should be out of harmony with myself.

Anyone who holds a true opinion without understanding is like a blind man on the right road.

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

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

The secret of change is to focus all of your energy not on fighting the old, but on building the new.

Wonder is the beginning of wisdom.

To find yourself, think for yourself.

To know thyself is the beginning of wisdom.

It would be better for me that the whole world should disagree with me than that I, being one, should be out of harmony with myself.

An honest man is always a child.

Let him that would move the world first move himself.