Lyric discussion by NewGrrlOntheBlock 

Gravity=Temptation. Temptation is something that pulls you toward it like gravity. the only way to not let temptation reel you in ("bring me down") is to avoid it or stay away from it period.

In this case temptation (gravity) is working against him because it could mess up what he already has. However we cannot escape gravity and he cannot escape this temptation. He pleads in vain knowing that although its working against him, he's still gravitating toward it.

" Just Keep me where the light is"--keep him close to what he already has, don't let him wander away toward temptation--However its like asking that we float about in the air as we walk when its inevitable we be pulled to the ground by gravity, a force we cannot escape...

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