Sometimes the most profound mathematics comes from playing with simple ideas until they reveal their hidden complexity.

When faced with challenges, focus on solutions rather than problems.

过去总是紧张的，而未来是完美的。

当我们探讨人类和环境的关系是，我们发现，与其说是人去适应环境，倒不如说是人创造一个环境来适应自己。