In times of change, the ability to learn is far more important than the ability to know.

If you control someone's interests, you control their expectations, and thus their actions.

You can't change what's already happened, so focus on the present moment.

I'm a fighter, and I'm not going to give up.

Every mathematical problem is a window into a new world of understanding.

最好的游戏是那些能把人们聚集在一起的游戏。