States are rational actors, and they will always act in their own self-interest.

The beauty of literature is that it allows us to live a thousand lives, to experience a thousand emotions, all within the span of a single lifetime.

The actions of men are the best interpreters of their thoughts.

动作发展应该是心理高层次的表现或反映，这是修理合乎自然发展逻辑的。

In physics, we often find that the most beautiful solutions emerge from the messiest problems.

The mind is a system of coordinated sensations.

孤独有时是我们为与众不同而付出的代价。