Singing it today at Morning Prayer, though, an uncomfortable lyrical parallel came to mind. Consider the second verse:
We are sons of the morning, we are daughters of day
The One who has loved us, has brightened our way.
Now consider some 'horror punk.' This is the beginning of the later Misfits song "Speak of the Devil:"
Traded in my bible for a little black cat
The time of Armageddon's here
Some call me the son of the morning
God knows I'm the angel of light
The reference is to Lucifer, who is indeed sometimes called the "Son of the Morning." This is an uncomfortable parallel for sure!