The designer of the first iPhone Jony Ive shares his perspective on ideas

ideas by definition are always fragile. If they were resolved, they wouldn't be ideas. They would be products that are ready to ship. I've come to learn that you have to make an extraordinary effort not to focus on the problems which are implicated with any new idea. These problems are known, they're quantifiable, and understood. But you have to focus on the actual idea, which is partial, tentative, and unproven. If you don't actively suspend your disbelief and focus on the idea, you'll lose faith in your idea. And that is why criticism and focusing on the problems can be so damaging, particularly in the absence of a constructive idea. Remember, opinions are not ideas. Opinions are not as important as ideas.