John Piper, What Jesus Demands from the World:

The demand that we come to [Jesus] is therefore like the demand of a father to his child in a burning window, “Jump to me!” Or like the demand of a rich, strong, tender, handsome husband to an unfaithful wife, “Come home!” Or like the demand of a rescue squad that finds you on the point of death, dehydrated after days in the desert, “Drink this!”