"We are all astronauts on a little spaceship called Earth."

言多必失，要谨言慎行，不要盲目争强好胜。  

每个孩子都值得在故事中看到自己。

There is no such thing as a small life. Every existence contains the universal.

Everything you’ve ever wanted is on the other side of fear.

数学中真正的挑战不是解决问题，而是提出正确的问题。