Software is a great combination between artistry and engineering.

I remember thinking quite logically that I didn't want to spoil my children with wealth and so that I would create a foundation, but not knowing exactly what it would focus on.

I believe that the world will be a safer place if there is enough food to go around, that it will be a more stable place if children grow up with opportunities instead of frustrations. Furthermore, I can only assume that if the United States plays a role in helping to create prosperous societies, we will have friends to call on in times of need.

I think when smallpox was eliminated, the whole world got pretty excited about that because it’s just such a dramatic success.

What destroys more self-confidence than any other educational thing in America is being assigned to some remedial math when you get into some college, and then it's not taught very well and you end up with this sense of, 'Hey, I can't really figure those things out.'

Does the e-mail say it's about 'enlargement' - that might be spam.

To succeed, you also have to know how to make choices and how to think more broadly.