Kill one person, that is the murderer, Kill 100 people, it is a hero.

穿着粗布衣裳，吃着简单饭菜，这样的快乐哪里需要刻意寻求？

Mental processes are biological tools for survival.

The essence of mathematics is not to make simple things complicated, but to make complicated things simple.

The best way to make your dreams come true is to wake up.

当我们既倾听科学家又倾听农民时，真正的进步才会发生。