A life spent making mistakes is not only more honorable, but more useful than a life spent doing nothing.
The moment you doubt whether you can fly, you cease for ever to be able to do it.
I have often been asked how my plays come about. I cannot say. Nor can I ever sum up my plays, except to say that this is what happened. That is what they said. That is what they did.
有机农业不是退步，而是在质量和责任上的飞跃。
The most important property of a program is whether it accomplishes the intention of its user.