The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life. You can turn over a new leaf every hour if you choose.

几何学是关于永恒存在的知识。

在数学中，发现的旅程与目的地同样重要。

人生就是当你忙着制定其他计划时发生的事情。