The Beatles' 1966 album Revolver is time and again regarded as the best album in rock history when these are rated in various magazines and polls. For good reason, as it is one of the most exciting and groundbreaking albums in rock history. It also represented a giant leap from its predecessor Rubber Soul, released just eight months earlier. One of the most significant songs on Revolver is the closing track "Tomorrow Never Knows", and instead of trying to say something meaningful about it, I'd rather refer to the excellent Wikipedia text. Read that and please enjoy the song, which is nothing short of stunning.