C. S. Lewis - his works were very, very important during my time there. We had discussion groups. I did become more attracted to it although I still attended the Methodist church. If you read Lewis. Then until this day, he did the lectures, something like christian behaviour and 'the screwtape letters', and we were all discussing them. I thought some of his work was the most illuminating to people reaching out to christianity because you're always questioning particularly at that age and you're looking for reassurance and for answers. Indeed you go on questioning throughout your life.

I think fiction is very important because it gets us into the mind of a person. Hamlet is a tremendous piece of literature. You know Hamlet better than you know most real people. Do you know the reason? Because you know what he’s thinking. And this teaches you that every human has an integrity and an autonomy and a spirituality of his own, of her own, and great literature can teach you that.

That really crystallized for me what some really passionate founders who could write some code could do to change things, and this gave me the confidence to say, “You know what? They can do this. We can definitely do this.” ... So without a doubt, Reddit would not exist if it weren’t for Masters of Doom.

I think of another book that I read – what was it called? – Night Train to Lisbon. I wouldn’t say it’s in that same category, but sometimes there was just a line in a book that changed my life in some way, and it came at a critical juncture. The line was, “Given that there is so much in all of us, what happens to the rest?”

For me, it was just a thrill. I just remember thinking at that time, this is the sort of thing I would like to do, if I could. I did not come from a family of scientists. My father was a lawyer, my older brother was a lawyer.

I had a number of very good teachers in high school, in fact. Some mathematics teachers that perhaps allowed me the freedom to go beyond the normal routine of the class and to explore some more advanced areas. The same thing happened in college. I was able to communicate with a few of my teachers and professors, and go beyond the normal expectations. And then, as I mentioned before, Professor Pimentel, my mentor for graduate studies, was really influential in terms of the influence that he had for me.

The advice that I would give is try to find something that you like. Try to devote your energies to being very good at it. Try to achieve excellence. Don’t necessarily have as a goal success or getting prizes or whatever, but just doing very good work. And work hard. Keep working at it. Be patient. Realize that you don’t always see the benefits of what you’re doing, short-term. But in the end, the activities that I do, for example, scientific research, can be extremely rewarding. It’s really a very fascinating career.

I did. As a kid, I liked music. I still like it a lot of course. I used to play the violin. I did contemplate, well, maybe that’s an option. I could become a musician. Somehow my parents got some advice that unless I was willing to spend eight or 10 hours a day just playing the violin that I should just give it up. To me, that was very bad advice because you could of course, get very involved in music without being a musician. Fortunately, even though I gave up eventually playing the violin myself, I never gave up my fondness for music. But if I had a chance again, I would not give it up. I would just do it as a hobby. I think that was just because I did not get the correct advice.

In terms of this issue of these industrial gases affecting the environment, at the beginning the road was not easy, because we were suggesting that society had to change, that industries had to do something different than they were doing at that time. And of course, initially we did not meet with a good reception to these ideas from industry. And even from the scientific community — even though our ideas were well received in the small group of specialists in what we were doing — it was not necessarily well received by the scientific community at large. So we really had to continue doing as good a science as we could, and at the same time trying to well communicate our conviction that it was something important, something that had to change in the way society was functioning.

Sherry offered me a list of research options: the one project that intrigued me the most consisted of finding out the environmental fate of certain very inert industrial chemicals – the chlorofluorocarbons (CFCs) – which had been accumulating in the atmosphere and which at that time were thought to have no significant effects on the environment. This project offered me the opportunity to learn a new field – atmospheric chemistry – about which I knew very little; trying to solve a challenging problem appeared to be an excellent way to plunge into a new research area.