Song of Ambiguity

A song of myself is one with no tune. It has no rhyme or reason, Nor rhythm or meaning. It cannot be heard by the naked ear, Sometimes it cannot even be heard by its creator. Sometimes my song gets lost. Sometimes it isn't mine at all. Sometimes I drown it out with thoughts. But always the tune remains in my head, Though it has no sound, Though it often changes, Though sometimes it's not a song at all.