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I am not a political person by nature. I don't think writers should be political persons. But in South Africa, you can't keep politics out of your life.
Not knowing is probably the best.
Invention is not enough. Tesla invented the electric power we use, but he struggled to get it out to people. You have to combine both things: invention and innovation focus, plus the company that can commercialize things and get them to people.
The Langlands program is a challenge to our understanding of the nature of mathematical truth.
I think it's important to take risks and not be afraid of failure.