- these lyrics suggest more of a decision making process to me, it sounds like the singer decides to search for a person he once loved, and from the chorus suggests that it takes alot of trust in himself to make the decision to look for this person in a world where everything changes, the word rust suggests change, aging etc. Where his decision could backfire, it is difficult to trust his own instinct, however he does so, as he longs for the beauty and wince in his heart.
I could be totally wrong, just my personal interpretation :) .