I think a very big curiosity. I’m very curious and I like to understand things and not only science but also other things where I just try to find out why things work or how things work. Science and nature caught my attention as a small child already. I was growing up in a city but we had a garden and I loved the garden and then often on vacation I was at a farm and I loved these animals and plants and so on, so I was attracted very early on and then we had a very good teaching actually at my … I don’t know whether my teachers really had much of a role because I was determined very early, but then I also did music and I did languages and Literature and so on. I have broad interests actually other than science, but this is really true, this curiosity.

Ultimately, it’s a man who was teaching us English Literature in what we call matricula, the last 2 years of high school. He really was quite extraordinary. When he spoke of a Shakespearean play, you almost thought that he grew up with Shakespeare! He was very good, yes. A black guy who was fantastic and gave us a deep love for literature.

I still regularly read New Scientist to try to keep up with quantum theory and cosmological discoveries and so forth. And I read National Geographic—that’s not a plug.

My answer may have surprised some in attendance at the meeting: I don’t have a role model or sensei. Or to be more precise, I don’t have a single teacher. Instead, I take it upon myself to learn from everyone around me. If we open our eyes, we may find that everyone can be our teacher.

Could I imagine a world without cursing? Hell, no! Every place I've ever gone, people have had to hold their ears.

There is a dignity associated with people, no matter where the hell they come from — whether they come from Italy or Ireland or Germany or Asia or Africa.

And I never forgot what he said, Bill Clinton. He looked at me, and he said, “You know, Leon, you can be the greatest OMB director in the history of the world, but nobody’s going to remember you if the White House has fallen apart!” I never forgot that.

But if our institutions of democracy are not working, that is an even greater threat to our national security

Love of family is something that is renewed in me every time I see them.

there was no way I could have accomplished the bin Laden operation without the help of Special Forces