You will vastly overestimate what people know, for example, your take on the current context or your reasoning for a specific course of action, assuming that others know what you know and see what you see; this is called False Consensus (Ross et al). Remember this when explaining the nuts and bolts of your vision, strategy and goals. Become accustomed to seeing the world differently from others, and defining reality as you see it regularly, more than you think you should need to (Senge).
Stan Slap once said “Most leaders would just get where they’re going by themselves and send a postcard if they could.” Don’t try it, it won’t work. Stand at the front, hold the map aloft and keep explaining again and again. Long past the point when you are bored.