你的时间有限，所以不要浪费在过别人的生活上。

Natural experiments are a powerful tool for understanding causal relationships in the real world.

文学的真正价值在于其提升人类精神的力量。

The knowledge of the circumstances of which we must make use never exists in concentrated or integrated form, but solely as the dispersed bits of incomplete and frequently contradictory knowledge which all the separate individuals possess.

We are all obsessed with the idea of the frontier, but it's a frontier that keeps receding.