Lyric discussion by Ventifact 

The phrase "simple as that" doesn't describe any Live song I've ever heard. As katerxdaisy points out, this song is a continuing consideration of the philosophical question of whether there's more to existence than physical reality, a question at the heart of the album The Distance to Here. The description of "naked lovers" recalls the opening of the album, "The Dolphin's Cry."

Ed then transitions through the observation that however we might physically describe reality, there's no denying the power of the intangible, of love, something you can't measure like you can a nerve impulse. Furthermore, it is scientific fact that everything is light (literally true, e = mc^2), existing eternally.

This transcendence transitions to the transcendent nature of Jesus (love personified) himself, appearing in the "masters in everytime, lords in everyplace: those who stood up for love down in spite of the hate."

All this is why he gives his heart and soul to the one, as those others have done before him. Musically this determination to give himself to love/Jesus is contrasted with the directionless despair of what it's like to now know all this, to go out of your mind looking back to your birth and forward to your demise, seeing nothing in your life but a physical lifespan and then a meaningless end.

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