Make me sound like the Dalai Lama chanting from a mountaintop, John Lennon told engineer Geoff Emerick. The result, on “Tomorrow Never Knows,” Revolver‘s concluding track, effectively kicked off the psychedelic rock movement. But the songs leading up to that still-trippy knock-out punch reveal the Beatles in transition on their most varied album. The melancholy strings on “Eleanor Rigby,” the guitar attack of “And Your Bird Can Sing,” and the loopy carnival of “Yellow Submarine” illustrate the unlimited palette the Fab Four were introducing to pop music — and make Revolver the best introduction to their work, and the strongest single example of their magnificence.