Arcana Coelestia #417
417. Verse 21 And his brother's name was Jubal. He was the father of all who play upon the harp and organ.
'His brother's name was Jubal' means doctrine concerning the spiritual things of this same Church, and 'the father of all who play upon the harp and organ' the truths and goods of faith.
John 15:10
10
If you keep my commandments, you will remain in my love; even as I have kept my Father's commandments, and remain in his love.