Mediocre theoretical physicists make no progress. They spend all their time understanding other people's progress.
You have to use your judgment. In cases like that, we say, 'let's be simple minded. We know this is a feature that's good for customers. Let's do it.
We change our tools and then our tools change us.
You can work long, hard, or smart, but at Amazon.com you can’t choose two out of three.
If you never want to be criticized, for goodness sake don't do anything new.
Am I going to regret leaving Wall Street? No. Will I regret missing the beginning of the Internet? Yes.