It takes more than 1 person to fulfil on a dream, a vision or a business strategy. If you ask any great leader how they achieved their goals and set about achieving thir vision, they will name a mentor, a coach, a trusted advisor, friend, relative or team to helped them along the way and guided them to achieving that goal.
Importantly, a team, coach or mentor provides leaders with both a sounding board for ideas and a critical eye and ear to keep them on the right path.