每个角色都是新的挑战，我享受探索不同角色的过程。
Innovation happens when you dare to think differently.
The design of a system should be guided by the principle of least surprise, where the behavior of components is intuitive and predictable.
The ideas of economists and political philosophers， both when they are right and when they are wrong， are more powerful than is commonly understood. Indeed the world is ruled by little else. Practical men， who believe themselves to be quite exempt from any intellectual influence， are usually the slaves of some defunct economist.
