Consumers are empowered by Yelp and tools like it: before, when they had a bad experience, they didn't have much recourse. They could fume, but often nothing else other than tell their friends.

Starting a company, your success is going to be very dependent on how you adapt. You're going to make decisions, you're going to make bets; most of them are going to turn out to be wrong.

On mobile, what are the core apps? It's basically messaging, mapping and review data.

The entrepreneurs that really make it are the ones that start with an idea but are ready to change it at a moment's notice.

You have to be very nimble and very open minded. Your success is going to be very dependent on how your adapt.

Everyone is panicked about the transition to mobile. I don't lose any sleep whatsoever.

Yelp is in a very nice spot: local data, and especially review data, is one of the killer apps on mobile phones.

I think with every successful consumer Internet business, there will be lawyers that are interested in going after your company, especially when they think that there's a financial incentive.

Maintaining the trust of the consumer is critical to our business

In the very beginning, Yelp started as a service where we really didn't think people would write reviews for fun. The whole concept of user-generated content was pretty nascent in 2004.

There are so many businesses that are succeeding on Yelp that don't pay us a dollar, and we're really excited about that.

The Maestro spoke again. "When we are not, at what point do we become?" I could not reply. For I had grasped no shape of his thoughts. I understood neither what he said nor his intent behind it.

The fuel of ambition is not the problem

Excellent firms don't believe in excellence - only in constant improvement and constant change.

The only difference between success and failure is the ability to take action.

Socrates' way of life is the consequence of his recognition that we can know what it is that we do not know about the most important things and that we are by nature obliged to seek that knowledge.

Crying wouldn't help anything now.

I didn't have an imaginary friend, and even if I did I'm sure it would have been derivative of something I saw on television. Optimus Prime maybe?

The science window gives you a view of the world, and the religion window gives you a totally different view. You can't look at both of them at the same time, but they're both true.

Wherever I live, if there isn't a restaurant I want to go to of a certain type, then I open it. That's all. For selfish reasons.

I am not a Virginian, I am an American.