Fortunately for Andrea Bocelli, this world has no shortage of illustrious classical and theatrical music for him to embrace, including both canonical arias and lesser-known wonders. He achieves a halcyon, persuasive elegance in Gounod's “Ave Maria” and Verdi's “Ah, la Paterna Mano”; his “Music of the Night” achieves a luminous, nocturnal majesty. And Bocelli touches Romantic greatness with Wagner's “Der Engel.”