My father was a great educator for me. He taught me so many things. He named me Carlos after a brother he lost — a very brilliant young man who died at 21 in Mexico. He had written very good poems. He was an intellectual. I think my father wanted to see his brother in me, so he put books into my hands at a very early age. He fostered my literary and artistic inclinations. So he was my best teacher.

It so happened that we had a very good math teacher, who was a Communist. I remember having learned from him something that I never forget: the rule of nines. A simple point: you add up the numerals in a number, and if the original number was divisible by nine, then the sum of the figures also is. For instance, you take a number like 243. Two and four and three is nine. Therefore, 243 must be divisible by nine. Actually it is nine times 27. The rule is interesting because it’s so simple. What was really interesting to us ten-year-olds is that our math teacher proved it. The proof is not terribly difficult, but it was one of the first simple and not quite obvious mathematical proofs that I encountered.

We'd walk in the canyons, and we'd often walk with Bethe, and Von Neumann, and Bacher. It was a great pleasure.

There are three teachers who are still involved in my life. Ray Wilson — who is my office manager, and who was a teacher in my high school, as well as my basketball coach in high school — is very much involved in my life, and is a real father figure for me. A gentleman named Earl Mosley, who never specifically taught me, but was always there, and was a role model for me, was a coach when I was a freshman. And then a guy named Charles McIlwaine, who is a teacher and a coach. In my high school years those three really stood out, really helped to become part of the support group that’s necessary when you’re experiencing all types of physical changes and mental changes, to help to explain things, and put them in the proper perspective.

One person that is my role model is my father. ... He’s a man who taught me something very important. And that was — give back to society what you’ve taken out.

When I went through school, I was in a hurry. I was an economics major as an undergraduate, and I was a finance major in graduate school. I was in a hurry to succeed when I got out in the business world. I’m sorry I didn’t take more courses in the humanities and in history and in the arts.

And that’s what’s given us the ability to say no. It’s one of the most important things at the end of the day, being able to say no to an investment. Even if you’ve done a lot of work, work will never hurt you.