“Mass” seeks the meaning and relevance of faith in an increasingly secular and noisy world. Sometimes humorous, occasionally bawdy, and at times profoundly moving, Bernstein’s masterpiece, based on the Roman Catholic liturgy, includes passages sung in Latin with additional texts in English by Bernstein and Broadway composer Stephen Schwartz. An enormous piece, the work, scored for orchestra, two choruses, marching and rock bands, actors, and dancers, also features rock, blues, Broadway, and classical music.