More than 80% of our revenue comes from people viewing ads on mobile devices. Inside Twitter, we talk and think mobile first.

Users want relevant content as advertising. As a result, the distinction between advertising and content is going away. All that matters to a user is relevancy.

Twitter is about the democratization of access to a platform that allows anyone in the world - who has a mobile phone and access to SMS - to have a voice and be heard.

Stupidity is letting your pride rob you of God’s blessings.

I kiss [her] even though I know that if you kiss a girl before you are married to her you might get AIDS.

I’d do anything for her if she really wanted me to. I would even walk away from the chance of a lifetime if she asked me to... and I could even be happy about it.

You may live in an unknown small village, but if you have big ideas, the world will come and find you!

Happiness is not something you acquire; love is not something you produce; love is not something you have; love is something that has you.

Individuals with a good self esteem can accept or reject the opinions of others, but never depend on them for their sense of worthiness.

We need to be more precise in how we talk about these issues. People around the word follow our presidential campaigns so closely, trying to get hints about what we will do.

I distrust anything that you don't hear.

One of the Arsenal players came up to me afterwards and said it had been an honor to be on the same pitch as me. I thought, My God, that is a great thing to say when your team has just lost.

A theory with mathematical beauty is more likely to be correct than an ugly one that fits some experimental data.