Dream. Dream. Dream. Be like God, dream because God believes in you young people. Most of God’s best collaborators and partners have been young people. Joseph, David, Jeremiah, St. Francis. They are young, young, young. And in many ways Jesus was young. Many of those who have been God’s best works — fellow workers have been young. And don’t allow oldies to fill you with their cynicism and disillusionment. Dream. Dream that this world can become better as you do dream, in fact. I mean, when these young people go off and work as Peace Corps and other volunteering groups in poverty stricken places where they don’t get any better headlines for dreaming the good things. Dream. Dream. Dream. Dream that this can be a world without poverty. Dream that this can be a world without war. Dream that this is a world that will recognize that every human being matters.

So I wish to you—I have no more time, so I have just one wish for you—the good luck to be somewhere where you are free to maintain the kind of integrity I have described, and where you do not feel forced by a need to maintain your position in the organization, or financial support, or so on, to lose your integrity. May you have that freedom. May I also give you one last bit of advice: Never say that you'll give a talk unless you know clearly what you're going to talk about and more or less what you're going to say.

Invent your own game and that way you can always be a winner.

You have to change from doubter to believer.

I then converted a bathroom, seldom used by the family, into a laboratory and spent hours playing with chemistry sets. With the help of an aunt, Esther Molina, who was a chemist, I continued with more challenging experiments along the lines of those carried out by freshman chemistry students in college.

proud of recognizing that as a scientist, it was not only important to do research and find new things. I also felt a responsibility to apply them for the benefit of society.

So achievement, to me, is something that just comes with this attitude of doing your work the best you can in a passionate way. It’s not something that you have to expect. It’s something that’s a consequence of what you do, but it’s certainly important.

It was probably a series of biographies of scientists like Pasteur, or even earlier ones — Leeuwenhoek inventing the microscope and Madame Curie. I forget how many others, but it was really just, for me, a fascination to learn about these great heroes. At that time, of course, they were totally inaccessible, almost non-human, to me. It became very interesting to me.

I certainly want to continue trying to understand how the global environment functions. The earth as a system is a very complicated one. And to understand it, we need very many disciplines, very many different scientists working together. I want to continue working with my specialty, which is chemistry, with the atmosphere. There is still much to learn about chemical reactions that occur out there in the air, in the atmosphere. So one of my projects now is to really learn more about this pollution that occurs in cities and that is spreading more through the globe. To learn it in enough detail so we can better tackle it, we can better come up with new ways of using energy, for example, that are not so damaging to the environment.

As I was starting my academic career, it was almost considered to be a negative signal to your career to get involved in politics ... But to me that was a sign you were doing something useful.