Education is an admirable thing. But it is well to remember from time to time that nothing that is worth knowing can be taught.

The richness I achieve comes from Nature, the source of my inspiration.

I’m not a pessimist. I’m an optimist who’s been through a lot.

To live is to be constantly surprised by life.

计算的本质不仅在于符号的操作，更在于对这些操作所代表意义的深刻理解。