The future we want must be invented. Otherwise we will get one which we don't want.
我们想要的未来必须被发明出来，否则我们将得到一个我们不想要的未来。
The best way to measure how much you've grown isn't by inches or the number of laps you can now run around the track, or even your grade point average - though those things are important, to be sure.It's what you've done with your time, how you've chosen to spend your days, and whom you've touched this year. That, to me, is the greatest measure of success.
数学是人类精神最美丽和最强大的创造。