A personal belief is that if you're not personally invested in what you're working on, you'll fail.

Obviously, working at Google wasn't a mistake. I used to just walk around. I don't know if I was supposed to, but I'd just open doors and see what people were doing.

In any leadership position, you're always going to be disappointing somebody.

You can shut down a service, and yet people will find ways to communicate.

Even though running is physically straining, it's mentally refreshing. Especially when you feel like you've accomplished something.

You can provide a short-format content, and it can grow, and it can spread virally across the entire Twitter system, and it can contain within it a link to something that's much longer, that's a long essay or that's a video.