For some reason I have always liked the scene in Jurassic Park where Jeff Goldblum says something along the line of "you were so busy figuring out if you could do it, you never stopped to ask whether you should do it."
That isn't quite an exact quote, but I've always liked it mostly because in business I often see people/departments fall into that same mode of focusing on whether they can do something before deciding if they should (as in will the market support a product, etc.).