The key to solving complex problems is often to find the right abstraction that simplifies the problem without losing its essential features.
解决复杂问题的关键通常是找到正确的抽象，这种抽象可以在不丢失问题本质特征的情况下简化问题。
The problem with quantitative easing is that it works in practice but it doesn't work in theory.
The best leaders are those most interested in surrounding themselves with assistants and associates smarter than they are.
我一直相信音乐可以团结人们，无论他们有什么不同。