I imagine this is what is playing in the background when Mack is with Sarayu in the festival of friends. All the brilliant colors he is seeing...how keen his senses were...
...and somehow, in the middle of the exploding storm, he found himself running across the meadow to find his father, running toward the source of the colors and emotions... (The Shack-Wm. Paul Young)
Amazing Grace... If this doesn't give you goose bumps... I don't know what will!!