Whatever the founder cares about, whatever the founders think are the key goals, that's going to be what the whole company focusses on.

You cannot create a market that doesn't want to exist.

I myself used to believe ideas didn't matter that much, but I'm very sure that's wrong now.

One of the pieces of advice that we give at YC is: try to work together on a project rather than just doing an interview.

It's difficult to get large groups of people, to the extreme levels of focus and productivity that you need, for a startup to be successful.

If it takes more than a sentence to explain what you are doing, it's almost always a sign that what you are doing is too complicated.

No growth hack, brilliant marketing idea, or sales team can save you long term if you don't have a sufficiently good product.