人声是最美的乐器，也是最难演奏的乐器。

对智能的研究必须基于对符号系统的研究。

Success only comes through preparation.

There is no love that’s so right as admiration-based love, and that love should include the instructive dead. Somehow, I got that idea and I lived with it all my life and it’s been very very useful to me.

成功往往青睐那些持续学习和适应变化的人。