Long ago, Sir Isaac Newton gave us three laws of motion, which were the work of genius. But Sir Isaac's talents didn't extend to investing: He lost a bundle in the South Sea Bubble, explaining later, 'I can calculate the movement of the stars, but not the madness of men.' If he had not been traumatized by this loss, Sir Isaac might well have gone on to discover the Fourth Law of Motion: For investors as a whole, returns decrease as motion increases.

I do know that when I am 60, I should be attempting to achieve different personal goals than those which had priority at age 20.

If past history was all there was to the game, the richest people would be librarians.

Cultivate curiosity and strive to become a little wiser every day.

Time is your friend, impulse is your enemy. Take advantage of compound interest and don't be captivated by the siren song of the market.

Mark Zuckerberg will be a hero to many young entrepreneurs 20 years from now. Bill Gates will be a hero to others, and they will look to those [people] like I read books when I was in my teens about Rockefeller or Carnegie.

I'm sitting with six and a half billion dollars we're going to use to close the Mars-Wrigley deal on October 6. I've got to hand over that six and a half billion on October 6. Now, I have to be very careful about who I leave it in between now and then, because they're expecting that he show up.