Abstraction is not just about hiding details; it's about creating a clear and concise model of the problem domain.

"The most important thing in communication is hearing what isn't said."

The study of mathematics is a constant dialogue between the concrete and the abstract.

The greatest discovery of my generation is that human beings can alter their lives by altering their attitudes of mind.

最好的故事是提出的问题多于解答的故事。