You are always a valuable, worthwhile human being — not because anybody says so, not because you're successful, not because you make a lot of money — but because you decide to believe it and for no other reason.
The best monsters are the ones that show us something true about ourselves.
In mathematics, as in life, the most elegant solutions often arise from a deep understanding of the problem.
我们每天可支配的时间是有弹性的；我们感受到的激情会扩展它，我们激发的激情会收缩它；而习惯会填补剩下的部分。