"Of the Father's Love Begotten"

A couple months ago, one of the hymns in Worship for Shut-Ins was "Of the Father's Love Begotten."  Listening to it, I realized that the melody to which the line "Pow'rs, dominions, bow before Him" is sung descends.  That descent musically illustrates the "bow[ing]."  Here's the melody; it's the third phrase of the tune "Divinum Mysterium":