心灵是一个可以在多个层次上分析的复杂系统。

There are things that happen and leave no discernible trace, are not spoken or written of, though it would be very wrong to say that subsequent events go on indifferently, all the same, as though such things had never been.

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.

Success is a lousy teacher. It seduces smart people into thinking they can't lose.