A classic engineering mistake and one I've made is confusing what is hard and what is valuable.

The single most important top-level trend is the shift to mobile.

Ignore your mistakes. The number one thing to worry about is -Am I doing what I'm good at?

You can have successful teams where people hate but deeply respect each other; the opposite (love but not respect among team members) is a recipe for disaster.

Having a highly homogeneous background, education, values, preferences, etc, in the very early team is better than not - cuts down on time-wasting arguments.

The world is now awash in data and we can see consumers in a lot clearer ways.

We're all put on Earth for a limited amount of time. Am I using in a way that is great, or good enough, or wasteful?

The notion that diversity in an early team is important or good is completely wrong. You should try to make the early team as non-diverse as possible.

Being an entrepreneur is not about being in love with an idea, it's about being in love with running a company.

You can't get married to any one particular plan. That is the biggest lesson I learned at PayPal.

Facebook is so ubiquitous now that it's like another manifestation of the web itself.

No one invites you to the top - you have to claw your way up. When you get there, you will sit with the others who were also uninvited - giggling.

Beyond the limit of suffering is strength.

Perhaps that’s the best way to recover, to return to the way things were before as quickly as we can. We won the Great Battle, so nothing needs to change.

I felt the water rising enough to touch my Vans. She was worth ruing a pair of shoes over.

If you get into a Broadway show and it doesn't work, you're a failure. And if it does work, you may be stuck for who knows how long. It just doesn't sound great to me!

Write whatever way you like. Fiction is made of words on a page; reality is made of something else. It doesn't matter how "real" your story is, or how "made up": what matters is its necessity.

Surely we may with reverence say that, in a true and deep sense, God Himself is the answer to prayer.

Facebook has focused on the conversation, but not really on absorbing the Web into its walled garden.

Belief in the supernatural or belief in wild talents like precognition and telepathy and telekinesis and things like that, it seems to me that belief in those things is just very, very freeing.