Author and critic Kenneth Womack writes of the Beatles exploring "phenomenologies of consciousness" on "Revolver", and he cites as examples "I'm Only Sleeping" preoccupation with dreams and the references to death in the lyrics to "Tomorrow Never Knows". In Womack's estimation, the songs represent two important elements of the human life cycle that are "philosophical opposites". Echoing this point, music critic Tim Riley writes that, just as "embracing life means accepting death", the fourteen tracks "link a disillusioned view of the modern world ... with a belief in metaphysical transcendence". Philo finds the Beatles' "countercultural engagement" evident on even the songs that present as standard pop. In Reising's view, all the songs on "Revolver" are linked, in that each line in "Tomorrow Never Knows", the closing track, is alluded to or explored in the lyrics to one or more of the tracks that precede it.