The greater the difficulty, the more the glory in surmounting it.

A healthy attitude is contagious but don't wait to catch it from others. Be a carrier.

Once I planned to write a book of poems entirely about the things in my pocket. But I found it would be too long and the age of the great epics is past.

I didn’t want to change society. I wanted to give society a chance to determine if it should change itself.

An investment in knowledge pays the best interest.

Between falsehood and useless truth there is little difference. As gold which he cannot spend will make no man rich, so knowledge which cannot apply will make no man wise.