Always demand a deadline. A deadline weeds out the extraneous and the ordinary. It prevents you from trying to make it perfect， so you have to make it different. Different is better.

释义：知足常乐的人会感到快乐，没有欲望没有追求的人会感到轻松。

可持续性不是一种趋势，而是我们对下一代的责任。