Never stop learning, because the world never stops changing.
永远不要停止学习，因为世界从未停止变化。
说出真相的唯一方法是不带说服意图地说话。
To understand the mind, we must first understand its evolutionary purpose.
I quite agree with them that it is not an ennobling experience. Poverty entails fear, and stress, and sometimes depression; it means a thousand petty humiliations and hardships. Climbing out of poverty by your own efforts, that is indeed something on which to pride yourself, but poverty itself is romanticised only by fools.
Combinatorics is like the art of counting without actually counting.