Feehily sings, This highlights the ultimate tragedy of the song: the narrator is consumed by a love that is massive and undefinable, while the person who inspired it remains oblivious or indifferent. It suggests that while love might be "simple" for the person walking away, it is a labyrinth for the one left behind.

Ultimately, "Simple Love" is a "deep" track because it refuses to provide a happy resolution. It leaves the listener in the "moonlight" of a cold morning, reflecting on the fact that , no matter how much we wish it to be.

The lyrical core of the song revolves around a central betrayal of expectation: This refrain acts as a bitter callback to the beginning of a relationship where love was presented as an easy, uncomplicated truth. Feehily’s delivery of these lines suggests a profound disillusionment; the "simplicity" promised by a partner has turned into a "mess up in [his] mind" and a sense of being "lost" and "far behind".