A-flat is an incredibly tough key to play in if you are a mandolin player. Pay close attention to the suggested fingerings here to try and nail this one down. It's a gorgeous and classic hymn that works beautifully on the mandolin. Let your spirit soar with this one. If you know the words make sure to work towards singing or speaking them as you play. It helps you as a musician in so many ways and is also very enjoyable once you get comfortable with it.