Two are better than one, because they have a good return for their work; If one falls down, his friend can help him up. But pity the man who falls and has no one to help him up!
Having a 2nd opinion on situations clears all doubt. Yes, you may think you know it all, but God has also equipped someone else in that same area to perhaps help you obtain your goal even quicker. Today, when approached with an opinion, receive it as advice. It may be the piece of the puzzle you've been trying to find all along.