The superior man thinks only of virtue; the common man thinks only of comfort.

The secret of genius is to carry the spirit of the child into old age, which means never losing your enthusiasm.

I'm sorry I wrote you such a long letter; I didn't have time to write a short one.

The best way to find yourself is to lose yourself in the service of others.

The more you lose yourself in something bigger than yourself, the more energy you will have.

I don’t think we are going to become extinct. We are very clever and very resourceful.

Strength of mind rests in sobriety; for this keeps your reason unclouded by passion.

My heroes are the ones who survived doing it wrong, who made mistakes, but recovered from them.

When I give, I give myself.

I'd rather be an optimist and a fool than a pessimist and right.

We are what our thoughts have made us; so take care about what you think. Words are secondary. Thoughts live; they travel far.

All thinking men are atheists.

My dear friend, clear your mind of cant.

I'd rather be hated for who I am, than loved for who I am not.

Truth is like the sun. You can shut it out for a time, but it ain't goin' away.

I am not bound to win, but I am bound to be true. I am not bound to succeed, but I am bound to live by the light that I have. I must stand with anybody that stands right, and stand with him while he is right, and part with him when he goes wrong.

You'll never do a whole lot unless you're brave enough to try.

If you want a thing done well, do it yourself.

I not only use all the brains that I have, but all that I can borrow.

No leader can be too far ahead of his followers.

Work gives you meaning and purpose and life is empty without it.