生活的目的不是快乐。它是有用、可敬、富有同情心，让你活得有意义且活得好。

The only limit to our realization of tomorrow is our doubts of today.

The design of learning algorithms should be guided by both theoretical insights and practical considerations.

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

所有科学的统一性仅在于其方法，而不在于其材料。

编程界最重要的事情是不断学习并适应新技术。