Another John Ortberg book, IF YOU WANT TO WALK ON WATER, YOU'VE GOT TO GET OUT OF THE BOAT, it's one I've seen around for a while and finally bought. I truly enjoy his humor!
God called Moses: Go to Pharaoh--the most powerful man on earth. Tell him to let his labor force leave without compensation to worship a god he doesn't believe in. Then convince a timid, stiff-necked people to run away into the desert. That's your calling.
And Moses said: Here am I. Send Aaron.