The following clip is excerpted from the 2007 D5 Conference when Steve Jobs and Bill Gates took the stage to chat with the WSJ’s Walt Mossberg. Below, Jobs talks about the passion necessary to truly achieve success not only in Silicon Valley, but in any avenue of life.

People say you have to have a lot of passion for what you’re doing, and it’s totally true. And the reason is because it’s so hard that if you don’t, any rational person would give up. It’s really hard, and you have to do it over a sustained period of time. So if you don’t love it, if you’re not having fun doing it, and you don’t really love it, you’re gonna give up. And that’s what happens to most people, actually. If you really look at the ones that ended up being successful, unquote, in the eyes of society, and the ones that didn’t – often times, the ones that are successful loved what they did so they could persevere when it got really tough, and the one’s that didn’t love it, quit. Because they’re sane, right? Who would want to put up with this stuff if you don’t love it?