The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function.

The essence of mathematics is not to make simple things complicated, but to make complicated things simple.

如果你理解，那就不是上帝。

"You can't control everything, but you can control how you react to things."

"We are all agreed that your theory is crazy. The question which divides us is whether it is crazy enough to have a chance of being correct."

Sustainability isn't just a trend—it's our responsibility to the next generation.