The development of efficient algorithms is as much an art as it is a science.
The heart of a poet is a mirror that reflects the beauty and the pain of the world.
成功不是幸福的关键。幸福才是成功的关键。
Good means not merely not to do wrong， but rather not to desire to do wrong.
The design of a system should be guided by the principle of least surprise, where the behavior of components is intuitive and predictable.