Take a look to this infographic about the creation of Instagram, one of the most popular social networks.

Do you see something strange? Yes, the founders threw away a big part of their job. Twice in less than two months!

As Seth Godin^[1] wrote last week (in this post):

I find that it's almost essential to fall in love with an idea to invest the time it takes to make it good and worth sharing. And then, the hard part: deleting that idea when it's just not what it could be.The "hard part" is what makes the difference between a good product and billions of mediocre things out there.

If you don't trust me nor Seth, try to ask Robert.

Image taken from Founders and Founders (license unknown).