唯一有价值的东西是你无法买到的东西。

你可以锁上你的图书馆；但对我的思想自由，你无法设置任何门闩、锁或插销。

在适宜的环境里，幼儿在工作中发展了一种技能和精确性，那是使我们十分欣慰的。

真正的创新发生在你挑战现状的时候。

In computational learning theory, we seek to understand the fundamental principles that govern learning from data.

The only constant is change, continuing change, inevitable change, that is the dominant factor in society today. No sensible decision can be made any longer without taking into account not only the world as it is, but the world as it will be.

Deep into that darkness peering, long I stood there wondering, fearing, doubting, dreaming dreams no mortal ever dared to dream before.

I am not a storyteller, but a story-maker.

世界是一块画布，我们是画家。