The whole of life is an act of letting go, but what hurts the most is not taking a moment to say goodbye.
The complexity of things—the things within things—just seems to be endless. I mean nothing is easy, nothing is simple.
The key to success is to focus on goals, not obstacles.
The beauty of a mathematical proof lies in its simplicity and inevitability.
当你愿意挑战现状时，创新就会发生。