The next generation of telescopes will see millions of events per night with computers that sift through huge amounts of data. If we had had access to a computer, we would never have programmed it to look for something so unexpected. How do you pick up the things you don't know exist, the things you can't tell it to look for? My project was to study quasars, and then we accidentally stumble over these things called pulsars. They were totally unexpected, totally unknown – and it's been huge fun.

On the one hand, we have people that say the aid system is so broken we need to throw it out. And on the other we have people who say the problem is that we need more aid. ... Both sides are right. And the problem is that neither side is listening to the other. Even more problematic, they're not listening to poor people themselves.

Over the past two centuries, our nation has moved from being an agricultural economy, to a manufacturing economy, to a service economy, and now to a predominantly financial economy. But our financial economy, by definition, subtracts from the value created by our productive businesses. Think about it: while the owners of business enjoy the dividend yields and earnings growth that our capitalistic system creates, those who play in the financial markets capture those investment gains only after the costs of financial intermediation are deducted. Thus, while investing in American business is a winner's game, beating the stock market before those costs is a zero-sum game. But after intermediation costs are deducted, beating the market—for all of us as a group—becomes a loser's game.

Technology itself does not decide what the future looks like.

I used to be “Mister Disinvestment.” Now I would like to be Mister Investment and say, “Come! Come and be part of an exciting, exhilarating process. Come in! Come in on the ground floor and see a people do something that’s probably never happened before, people seeking to become something radically different from what their antecedents would have made us believe they were likely to become.

One moment, Nelson Mandela is in jail, and the next moment, he is walking, a free man. One moment, we are shackled as the oppressed of apartheid; the next, we are voting for the very first time. I was 63 when I voted for the first time in my life in the country of my birth. Nelson Mandela was 76 years of age. But it happened, it happened. It happened partly because the international community supported us. People prayed for us. People demonstrated on our behalf, especially young people. Students at universities and college campuses used to sit out in the baking sunshine to force their institutions to divest and the miracle happened. We became free because we were helped and we want to say a big “thank you” to the world. And, you can become free nonviolently.

So a great deal has changed, but we in the Truth and Reconciliation Commission said, “Watch it. You can kiss reconciliation and forgiveness goodbye, unless the gap between the rich and the poor — the haves and the have-nots — is narrowed, and narrowed quickly and dramatically.” So yes, we face very, very considerable problems.

I have come to realize the extraordinary capacity for evil that all of us have because we have now heard the Truth and Reconciliation Commission, and there have been revelations of horrendous atrocities that people have committed. Any and every one of us could have perpetrated those atrocities. The people who were perpetrators of the most gruesome things didn’t have horns, didn’t have tails. They were ordinary human beings like you and me. That’s the one thing. Devastating! But the other, more exhilarating than anything that I have ever experienced — and something I hadn’t expected — to discover that we have an extraordinary capacity for good. People who suffered untold misery, people who should have been riddled with bitterness, resentment and anger come to the Commission and exhibit an extraordinary magnanimity and nobility of spirit in their willingness to forgive, and to say, “Hah! Human beings actually are fundamentally good.” Human beings are fundamentally good. The aberration, in fact, is the evil one, for God created us ultimately for God, for goodness, for laughter, for joy, for compassion, for caring.

I stopped being a teacher when the South African Government introduced a deliberately inferior education for blacks called Bantu education, and I felt I wasn’t ready to collaborate with this apology for an educational system. Our children, the 1976 kids who revolted against apartheid in Soweto, called it “gutter education,” and it was gutter education. I left teaching. Of course, I didn’t have too many option, and mercifully, the Bishop of Johannesburg at that time accepted me for training for the priesthood. So I came to the priesthood, as it were, by default.

Many of us had moments when we doubted that apartheid would be defeated, certainly not in our lifetime. But, I never had that sense. I knew in a way that was unshakable, because you see, when you look at something like Good Friday, and saw God dead on the cross, nothing could have been more hopeless than Good Friday. And then, Easter happens, and whammo! Death is done to death, and Jesus breaks the shackles of death and devastation, of darkness, of evil. And, from that moment on, you see, all of us are constrained to be prisoners of hope. If God could do this with that utterly devastating thing, the desolation of a Good Friday, of the cross, well, what could stop God then from bringing good out of this great evil of apartheid? So, I never doubted that ultimately we were going to be free because ultimately, I knew there was no way in which a lie could prevail over the truth, darkness over light, death over life.