Haydn replied, “when I think of God, my heart leaps for joy.” Haydn’s joy inspires this program featuring the Agnus Dei and Dona nobis pacem from the “Nelson” Mass as well as music of Schumann (Piano Fantasy, Op. 17, second movement, with its extraordinary leaping), Mahler (an excerpt of his Fourth Symphony finale with texts that speak of joy in heaven), and Olivier Messiaen (an excerpt of “Watch of the Spirit of Joy” from Twenty Contemplations of the Infant Jesus).