In mathematics, the most profound ideas often arise from the simplest observations.

In energy, the only constant is change—embrace it.

If economists could manage to get themselves thought of as humble， competent people on a level with dentists， that would be splendid.

Leadership is about inspiring others to achieve what they thought was impossible.

我不考虑我卖了多少唱片。我只考虑音乐。

"I write to make the invisible visible."