Quantum mechanics is not just a theory about the world, it is a description of the world at its most fundamental level.
The farmer is the only man in our economy who has to buy everything at retail, sell everything at wholesale, and pay the freight both ways.
When every penny must be calculated, the margin for error evaporates.
如果所有的人都是富有的，那么所有的人都是贫穷的。
"The only way to do great work is to love what you do."
看着容易，要学会就很难；千万不要把容易得到的东西看得普通，就不知道珍惜。