Bones lyrics by Radiohead

Radiohead is a strange band but I fell in love with them after I heard an album by them at my friends house... :)

Well he is very literal. He is describing the aging process. However, the chorus if left alone would make me think he wants me to really get whatever it is I'm doing done to my very bones, "When you've got to feel it in your bones.", is very close to this although the use of "When" again brings home the literal point of what can happen when we age.

We've got youth (I used to fly like Peter Pan) and old age (the rest of the song pretty much).

There's nothing really to interpret. But, again, without the lyrics in front of me, I'd say the song means I need to really get into something that I'm doing so that it goes to my bones deep in experience.