Following the past three seasons’ sold-out concerts in nearby Rhinebeck, the Bard Music Festival returns off-campus for Program Six, “I live with God ever before me: Mozart’s Religion.” Featuring James Bagwell, the Bard Festival Chorale, and the renovated organ of the Episcopal Church of the Messiah, this program presents a sampling of Mozart’s own sacred music, dating from God is Our Refuge, a motet composed at just nine years old, to two Church Sonatas and the dramatic liturgical psalm settings of his Vesperae solennes de Confessore. These will be heard alongside the original, less familiar version of Gregorio Allegri’s haunting Miserere, a work strictly guarded by the Vatican until Mozart transcribed it from memory as a child; J. S. Bach’s funeral motet Fürchte dich nicht; the fourth Chandos Anthem by George Frideric Handel, whom Mozart held in particularly high esteem; an Epiphany anthem by his student Thomas Attwood, the organist of London’s St. Paul’s Cathedral; and the Missa brevis in F, a major liturgical choral work by Joseph Haydn, with whom Mozart shared a close friendship and deep-seated mutual reverence.