. . . that music was the moment at which Beethoven finally passed beyond the suffering of his life on earth and reached for the hand of God, as God reaches for the hand of Adam in Michaelangelo's vison of the creation.
Well, either the adagio movement of the 9th or the late piano sonatas, in particular, Opus 109, Opus 110, and Opus 111. To my ear, those late compositions are unsurpassed in depth and beauty.
In these and a few other compositions of the great composers we achieve a glimpse of what music is capable of. Just as one will never appreciate the possibilities of genuine philosophy by reading hacks such as Ayn Rand or positivist philistines (philosophistines?) such as David Stove, one will never appreciate the possibilities of great music and its power of speaking to what is deepest in us if one listens only to contemporary popular music.