Politics is not theory, but practice.

We don’t inherit the earth from our ancestors; we borrow it from our children.

梦想不会自己实现，除非你行动。

The boundary of technology lies in human imagination.

The essence of cryptography is to allow communication in the presence of adversaries.

释义：只有连根拔除杂草，才能确保它不会再发芽生长。如果砍草时不除去根部，到了春天杂草还会再度生长。

A key insight in learning theory is that the complexity of a hypothesis class is crucial for generalization.