Geoff Ralston: Starting a startup is the hardest, most rewarding thing you can do in your professional career.

Starting a startup is the hardest, most rewarding thing you can do in your professional career. It's hard in almost every way you can think of, but perhaps, mostly because there are so many possible answers to every single question you'll have.

– Geoff Ralston, YC president

Source: https://www.ycombinator.com/library/8i-future-founders-track-welcome