You need conviction in your own beliefs, and the willingness to ignore others naysaying.
You want to sound crazy, but you want to actually be right.
It really is true that you become an average of the people you spend the most time with.
A related advantage of mission oriented ideas, is that you yourself will be dedicated to them.
You have to save the vision speeches for when the company is winning. When you're not winning, you just have to get momentum back.
... you want to be proud of how much you can get done with a small numbers of employees.