不要为别人而活，为自己而活。

The best way to learn econometrics is by doing—working with real data and real problems.

I’m not a person who is happy just because I’m successful.

There's not a day goes by I don't feel regret. Not because I'm in here, or because you think I should. I look back on the way I was then. Then a young, stupid kid who committed that terrible crime. I want to talk to him. I want to try and talk some sense to him, tell him the way things are. But I can't. That kid's long gone and this old man is all that's left. I got to live with that. Rehabilitated? It's just a bullshit word. So you go on and stamp your form, sonny, and stop wasting my time.Because to tell you the truth, I don't give a shit.

Language is not innocent. It carries the weight of history and power.

Program testing can be used to show the presence of bugs, but never to show their absence!

Every language is an old-growth forest of the mind.