The past is not dead; it is not even past.
I don't think about age. People who tell me I'm too old to do something, I just ignore them.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法:它是关于理解的。
我对自己是谁、做什么非常有信心。
Innovation is not about saying yes to everything. It's about saying no to all but the most crucial features.