Innovation comes from saying no to a thousand things to focus on the few that really matter.

The interplay between discrete mathematics and computer science has been a fertile ground for innovation and discovery.

译文：专门注重修养内心的人每天都会看到自己的不足，专门注重增长见识的人每天都会看到自己的长处。每天看到自己不足的人会逐渐变得有长处，每天看到自己有长处的人会逐渐变得有不足。