"Stir the Soul" probably comes from the famous Daniel Burnham quote, "Make no little plans; they have no magic to stir men's blood and probably themselves will not be realized. Make big plans; aim high in hope and work, remembering that a noble, logical diagram once recorded will not die, but long after we are gone be a living thing, asserting itself with ever-growing insistence."
I would love to volunteer at some point, though now that I'm thinking about it I probably should have volunteered before the committee came to Chicago this week.