(This is the second phrase, but it's also repeated as the last phrase.)
In the first verse, the text here is "The Father everlasting, by all the earth adored." "Everlasting" is sung with a melisma (A F Bb C D), and since it's drawn out, there's something of a sense of the word's meaning.
The text here in the third verse, addressed to Christ, is "Yet You, with boundless love, sought to rescue ev'ryone." "Love" is sung with a melisma (Bb C), and because the word isn't limited to a single pitch, there's a musical representation of that "boundless."
In the fourth verse, the text is "Upholding earth and heaven by forces You command." "Upholding" is sung to an ascending group of notes (D F G Bb), giving a sense of its meaning. The melisma provides some emphasis.
When this musical phrase is repeated at the end of the fourth verse, the text is "In glory everlasting. Amen, O Lord, amen!" As above, "everlasting" is sung with a melisma (the same notes, even: A F Bb C D), giving a sense of duration.
