The start up is a magical place. It’s a place where expenses are someone else’s problem. It’s a place where that pesky thing called revenue is never an issue. It’s a place where you can spend other people’s money until you figure out a way to make your own. It’s a place where the laws of business physics don’t apply. The problem with this magical place is it’s a fairy tale. The truth is every business, new or old, is governed by the same set of market forces and economic rules. Revenue in, expenses out. Turn a profit or wind up gone.
– from Rework book by Jason Fried and David Heinemeier Hansson