学会怎么打称人结（又叫“撑人结”，不会越拉越小的结）。而且要摸黑练习、单手练习。在今后的日子里，你根本想不到它有多有用。

You can't change the past, but you can ruin the present by worrying about the future.

The only thing that scares me more than space aliens is the idea that there aren't any space aliens. We can't be the best that creation has to offer. I pray we're not all there is. If so, we're in big trouble.

Humans should pursue wisdom.

辩论的时间已经结束；行动的时间就是现在。