Philip Glass at 75. Glass Chamber Works at The Temple of Dendur

You have to hand it to Philip Glass: 75 years old and a career on fire. And even more remarkable are the simple musical elements that made that career: the oscillating thirds, the arpeggios, and the basic melodic motifs that have entranced a vast spectrum of listeners. New York has seen a flurry of concerts to fete the hometown composer in his 75th year.