Be prepared: When you are 90% done any large project (a house， a film， an event， an app) the rest of the myriad details will take a second 90% to complete.

A creative man is motivated by the desire to achieve, not by the desire to beat others.

Force and fraud are in war the two cardinal virtues.

译文：人必须在事情上磨炼，才能立得住;才能做到安静时也安定，行动时也安定。

I have never been able to write a happy play. I can't. I can write a funny play, but I can't write a happy play.