The highest manifestation of life consists in this: that a being governs its own actions. A thing which is always subject to the direction of another is somewhat of a dead thing.
战争这种事，百年或许都用不上一次，但绝对不能有一天忘记它。
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.
In the world of physics, we often find that the simplest questions are the hardest to answer.