It is the mark of a truly intelligent person to be moved by statistics.

Small minds are concerned with the extraordinary, great minds with the ordinary.

I'm not the smartest fellow in the world, but I can sure pick smart colleagues.

The surest sign that intelligent life exists elsewhere in the universe is that it has never tried to contact us.

I'm an optimist in the sense that I believe humans are noble and honorable, and some of them are really smart. I have a very optimistic view of individuals.

We have now sunk to a depth at which restatement of the obvious is the first duty of intelligent men.

The mind is not a vessel to be filled but a fire to be kindled.

Knowledge is love and light and vision.

The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

Your intellect may be confused, but your emotions will never lie to you.