The future of marketing is philanthropy.

At Twitter, mobile is in our DNA ... For us, it's all about mobile, and it always has been.

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.

Success isn´t guaranteed, but failure is certain if you aren´t truly emotionally invested in your work.

I started designing book jackets, which was great because I was good at it. And then from there I decided to become a freelance graphic designer and I needed to expand beyond book jackets, so I taught myself web design, and then in 1999 some friends of mine decided to start a company called Xanga.com, which was a very early kind of social network slash blogging community.

Willingness to take risks is the path to success.

If you make the opportunity. you'll be the first in the position to take advantage of it.