One cannot think well, love well, sleep well, if one has not dined well.

Climate change is one of the biggest challenges of our time, and we must take action now.

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.

改变是困难的，但对于进步是必要的。

Greatness is not this wonderful, esoteric, elusive, god-like feature that only the special among us will ever taste. It’s something that truly exists in all of us.

The beauty of physics lies in its ability to explain the simplest phenomena with the most profound theories.