We make things to remember, and we remember by making things.

一种善行没有内心的支持就不会长久，一种行为如果得不到自身的了解就无法树立。 

Sometimes the hardest part of the journey is believing you're worthy of the trip.

The interplay between discrete and continuous mathematics is where some of the most interesting problems lie.

Every challenge is an opportunity in disguise.