Eh, it's just like every other vocal theme song in the series. The never really fit the game's storyline...they just sort of fit the feel of the scene they're played during. "Melodies of Life" is guilty of this, but it certainly has lyrics that fit it's game better than "Kiss Me Goodbye" or "My Hands" did.

The only exception is "Eyes on Me" from Final Fantasy VIII. It was tailored specifically for that game and fits the storyline perfectly.