As Christine Cain indicated, to build a strong team, you must see someone else's strength as a complement to your weakness, not a threat to your position or authority. Great leaders aren't know-it-alls who continuously try to outshine everyone. They listen to their teams, ask the right questions, and give everyone the chance to contribute. Instead of trying to do it all, they find people who can do it better.
At the end of the day, it's not about being the smartest person in the room. It's about building a team with the most intelligent people you can find and inspiring them to believe in the impossible.