Quotes from Jack Dorsey

When people come to Twitter and they want to express something in the world, the technology fades away. It's them writing a simple message and them knowing that people are going to see it.

The idea of Twitter started with me working in dispatch since I was 15 years old, where taxi cabs or firetrucks would broadcast where they were and what they were doing.

I think Twitter is the future of communications and Square will be the payment network.

What's interesting about Twitter and the influencers that someone follows - like, say, Shaquille O'Neal - is that they see someone who is using the exact same tools that they have access to, and I think that inspires this hope to be able to really engage with someone like him.

'Luck' is recognizing when the situation encourages build out and execution.

Make every detail perfect and limit the number of details to perfect.

I am someone who tweets about what I have for breakfast, what I have for lunch, what I have for dinner, and for 99.99999 percent of the world, it's useless. It's meaningless. But for my mother, she loves it.

People who are using it to sell things on Craigslist to holding garage sales - campaigns - the Obama campaign and the Romney campaign both used Square to raise funds.

Twitter has been my life's work in many senses. It started with a fascination with cities and how they work, and what's going on in them right now.

You can follow your favorite company or organization. You can also mix that in with your family and your social network and talk about all these interests in real time. That's the value, not the brand 'Twitter.' Twitter just provides the venue for it.

It's a matter of invitations versus context. Twitter is really good at providing context, like, I'm having coffee at Third Rail Coffee.' Foursquare is about invitations to places. In this respect Foursquare has started to replace Yelp for me.

I said a long time ago that Foursquare can make cities better. You have these augmented realities like Foursquare and Twitter and Facebook that provide these virtual nodes and instant feedback from anywhere, adding annotation around a physical places.

Make every detail perfect and limit the number of details to perfect.

My goal is to simplify complexity.