未来总是在变化，但过去总是一样的。

The flame of the spirit burns brightest in solitude.

数学中发现的快乐是无与伦比的。

The only thing you sometimes have control over is perspective. You don't have control over your situation. But you have a choice about how you view it.

变化不仅仅是生活的必要，它就是生活本身。