Lyric discussion by joejoeself 

if one assumes that gravity=love than the first line means that hes fallen in a love that he can never have and its bringing him down.

the line "ill never know what makes this man With all the love that his heart can stand" means that he wants to attain a higher love for this woman (by being in a relationship with her) but he will never know how that feels.

the line "dream of ways to throw it all away" can be interpreted many ways, it could mean suicide, but knowing john it probably means that he always thinks of ways to destroy their friendship so he can forget about her and try to move on with his life.

now i like this next part. the lines " Oh, twice as much ain't twice as good And can't sustain like one half could It's wanting more that's gonna send me to my knees " could mean a few things. i think it means that no two girls in the world could even come close to half of this girl whom he loves. by the line "Its wanting more thats gonna bring me to my knees" means that he wants more, and by more he means a relationship with this woman and he wants it so much that it will bring him to his knees (im not quite sure what he means by "bring me to my knees", possibly suicide? or maybe prayer?)

the lines " Gravity, stay the hell away from me And gravity has taken better men than me Now how can that be" mean that he has seen this woman be in relationships with other men before, and he thinks its because she thinks they are better, and by the lyrics "now how can that be" he means that he doesnt think that these other men are worthy and he himself would treat her so much better than hes seen any other guy treat her before.

"keep me where the light is" could also mean a few things, most likely he wants to stay where the light is and try and stay happy and not let it get him down.

thats just my interpretation of it, and of course there are many ways to interpret this song.

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