The world is a very complicated place, and it's not getting any simpler.

The essence of mathematics is not just in solving problems but in asking the right questions.

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.

历史不仅仅是关于国王和王后的；它是关于普通人及其非凡生活的。

Drawing is rather like playing chess: your mind races ahead of the moves that you eventually make.