In the second verse, the text here is "And all our sins confessing." "Sins" is sung with a melisma (C B), musically giving a sense of that "all." In the fourth verse, the text is "Past death and all despairing." Here, the "all" itself is sung with that same melisma for the same effect. In the fifth verse, the text is "Your mercy walk beside us." "Walk" is sung with still the same melisma, musically giving a sense of movement (and there's an added sense of stepping since C and B are adjacent notes).
I also noticed one thing in the sixth phrase:
In the first verse, the text here is "We raise to You our earnest cry." The melody ascends at the beginning, musically giving a sense of that "rais[ing]" (although it's used metaphorically).
Looking at just the text, I also noticed some alliteration in the third verse: "For You have been our strength and stay." The repeated st provides a sense of steadfastness.
