I don't think anything is unrealistic if you believe you can do it.
The only thing I fear is God.
The greatest discovery of my generation is that a human being can alter his life by altering his attitudes.
There is no such thing as a quality problem. There are only problems, and the solutions to those problems may involve quality considerations.
物理学的创新往往来自于以新的方式看待老问题。
创新不是对每件事都说“是”，而是对除最关键功能外的一切说“不”。
数学不仅仅是关于数字、方程、计算或算法：它是关于理解的。