I love this quote:
First and foremost, a start-up puts you on an emotional rollercoaster unlike anything you have ever experienced. You flip rapidly from day-to-day – one where you are euphorically convinced you are going to own the world, to a day in which doom seems only weeks away and you feel completely ruined, and back again. Over and over and over. And I’m talking about what happens to stable entrepreneurs.
– Marc Andreessen