Learn how to tie a bowline knot. Practice in the dark. With one hand. For the rest of your life you’ll use this knot more times than you would ever believe.
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。
如果你不犯错，说明你解决的问题还不够难。那本身就是个大错误。
现代社会已经迷失了方向，被物质主义和肤浅所吞噬。
The soul should always stand ajar, ready to welcome the ecstatic experience.
The study of automorphic representations is a journey into the hidden patterns of mathematics.