我不是因为快乐而唱歌；我因为唱歌而快乐。

【讲解】：孝敬父母，尊敬长辈是做人的根本。

I don’t paint to communicate; I paint to see.

The past is never dead. It's not even past.

The most important property of a program is whether it accomplishes the intention of its user.

"The only real progress lies in learning to be wrong all alone."