If ever you’ve longed for a concert to refresh your spirit, calm your soul, and envelop you with a peaceful glow, this evening grants your wish. Copland’s ballet Appalachian Spring is quintessentially American—full of vitality, hope, and belief in the future. Then, young prodigy Gavin George returns to the Dayton Philharmonic for Mozart’s Piano Concerto No. 21. And finally, step into the landscape Beethoven has painted with music. His “Pastoral” Symphony depicts all manner of birds, a babbling brook, and a terrifying storm. But before long, tranquility is restored, and—surprise!—“The Mighty Thunderer” shows us his softer side.