Grit is passion and perseverance for very long-term goals.

Make it a rule never to give a child a book you would not read yourself.

Your passion should be greater than your fears.

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.

别难过……世界上有许多人还不知道他们到底是谁或什么。