"Randomized experiments are the gold standard for causal inference, but they are not always feasible."

The essence of entrepreneurship is innovation, and the essence of innovation is breaking the rules.

我们不是从祖先那里继承了海洋；我们是从子孙那里借来的。

The great advantage of old age is that you can be as rude as you like.

The truth is always more complicated than we think.

You have to have confidence in your ability, and then be tough enough to follow through.

The human mind is capable of comprehending the universe because the universe has generated minds capable of comprehending it.

我不去想过去。我专注于现在和未来。