You can basically change everything in a startup but the market.

You're saying no ninety-seven times out of a hundred, and most founders find they have to make a very conscious effort to do this.

When it comes to starting startups, in many ways, it's easier to start a hard startup than an easy startup.

Firing people is one of the worst parts of running a company. Actually in my own experience, I think it is the worst.

There are exceptions of course, but most companies start with a great idea - not a pivot.

You also want people who are maniacally determined and that is slightly different than having a risk tolerant attitude.

The other piece besides focus for execution is intensity. Startups only work at a fairly intense level.