I do not even remember how I came across this! I listened this morning for the first time to a discussion about an old hymn and then the actual singing of the hymn. I found it to be a most delightful YouTube video. It was also early morning on a cloudless day as I listened. This only heightened my awareness of the light. I hope you like it, also! Luke Powell gives a very nice discussion of how the author Walter Chalmers Smith weaves the theme of God and light throughout the hymn. I had never thought of God and light quite that way before. At the end the he plays and sings the hymn.

Immortal, invisible, God only wise! Yes, the describes the song of my soul, too!