There is but one evil, ignorance.

Aren't you ashamed to be concerned so much about making all the money you can and advancing your reputation and prestige, while for truth and wisdom and the improvement of your souls you have no thought or car?

I only know that I know nothing

The really important thing is not to live, but to live well. And to live well meant, along with more enjoyable things in life, to live according to your principles.

It is possible that a man could live twice as long if he didn't spend the first half of his life acquiring habits that shortens the other half

Give me beauty in the inward soul; and may the outward and inward may be one.

When you propose ridiculous things to believe, too many men will choose to believe nothing at all.