He is (rhetorically) asking a girl how he is supposed to deny his unrequited love. He does this through the metaphors of a genesis-esque restraint of forbidden fruit, a journey of infinite distance, letting a bird grow without letting it leave him, and seeing the sunrise during the night. Each metaphor seems more and more impossible, as is his ability to deny his love for this girl.
He is (rhetorically) asking a girl how he is supposed to deny his unrequited love. He does this through the metaphors of a genesis-esque restraint of forbidden fruit, a journey of infinite distance, letting a bird grow without letting it leave him, and seeing the sunrise during the night. Each metaphor seems more and more impossible, as is his ability to deny his love for this girl.
this is a simple yet brilliant song.