Embrace your constraints. They are provocative. They are challenging. They wake you up. They make you more creative. They make you better.

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

If people are passionate about your product, whether it's because they're hating or loving it, those are both good scenarios.

The most rewarding thing for me has been this affirmation for me that people are basically good and smart, and if you give them a simple tool that allows them to exhibit that behavior, they'll prove it to you every single day.

Both my wife and I have a lot of compassion for animals in general.

I think before Twitter people didn't think that way, not in any sort of meaningful or specific way, so what I'm trying to say, if we're trying a bunch of stuff, a lot of cool and great social stuff, a lot of platform stuff, then some of it will stick, and some of it will be junked over. Some of it will be just like the cell phone, you can't imagine not having it.

You have to have an emotional investment in what you're doing. If you don't love what you're doing, failure is pretty much guaranteed.