Right now, nearly all the apps on Facebook take a week to build. No more.

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.

Everybody's got the potential for great good and great wrong in them, but it's thechoices we make that define who we really are.

A gift involves sacrifice. If you give away something that you no longer value or want, it cannot be a gift. It is simply a discarded item.

I'll hide it on the Internet

The total absence of humor from the Bible is one of the most singular things in all literature.

When you look at the Moon, you think, ‘I’m really small. What are my problems?’ It sets things into perspective. We should all look at the Moon a bit more often.

I think I'm like most novelists in that my books have gotten farther and farther away from autobiography the longer I've been writing them.

Our public spaces are as profound as we allow them to be.

I always thought that it was kind of silly that a baseball card could be worth so much money.

The most wasted day of all is that on which we have not laughed.

Get off, you look ugly (to a blood splattered player during a game)