From Cracking the pottery by Seth Godin:

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. Too often, organizations are good at the first part, but struggle with the second. And so we defend expired business models, support the status quo and have a knee-jerk inclination to preserve what we've got.
When you get in the habit of breaking your own pottery, it's a lot easier to ask, "what if?" If you know that it's okay to break it later, it's a lot easier to fall in love with it now.