A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.
Never stop questioning how things can be done better—complacency is the enemy of progress.
数学语言是通用的；它超越了所有文化障碍。
It is remarkable how much long-term advantage people like us have gotten by trying to be consistently not stupid, instead of trying to be very intelligent.
当你被一群对共同目标充满热情的人包围时，任何事情都是可能的。
You have to be willing to fail in order to succeed.