To understand a program you must become both the machine and the program.

I’ve learned that you don’t get to control what happens to you, but you do get to control how you respond.

It's enough for me to be sure that you and I exist at this moment.

The iron rule of nature is: You get what you reward for.If you want ants to come, you put sugar on the floor.

可持续性不再是选择，而是我们对后代的责任。