Don’t give the right information of your plans to the wrong people. Don’t invite unnecessary opinions in your life to deal with necessary, purpose oriented goals. Don’t allow the naysayers to internally reframe, reinterpret, redesign and restructure both your plans and strategies.
Many of the other people, often, can’t even decide what’s best for themselves. They choose comfort and its side-effects instead of well calculated risks, the uncommon path and their rewards. You don’t need people to believe in you to integrate confidence in your life. You need the right mentors, to integrate higher function of you in your mission.