Old age is not interesting until one gets there.

A computer program does what you tell it to do, not what you want it to do.

I have to be alone very often. I'd be quite happy if I spent from Saturday night until Monday morning alone in my apartment. That's how I refuel.

针对不同的情况采取不同的策略，针对不同的问题采取不同的解决方法，具体问题具体分析。