"Lord, 'Tis Not That I Did Choose Thee"

A little over a month ago, I watched the Concordia University Wisconsin chapel service from 25 January.  The hymn was "Lord, 'Tis Not That I Did Choose Thee" (LSB #573), and I noticed some significant accidentals in the alto part.  Here are the fifth and sixth phrases from the tune "O du Liebe meiner Liebe":

In the first verse, the text here is "Thou hast from the sin that stained me / Washed and cleansed and set me free."  Under the first "me," there's a C#, and the accidental provides some sense of being "stained" by sin, but in the following phrase, it reverts to a C natural under "cleansed," giving some sense of that purity.

"O du Liebe" (TLH #145)

"Jesus, Refuge of the Weary"

My weekly tune from The Lutheran Hymnal this week was "O du Liebe."  I referenced The Lutheran Service Book to find that this tune (with a slightly longer title: "O du Liebe meiner Liebe") is used for "Jesus, Refuge of the Weary," and I also noticed a small musical/textual connection.  In the first verse, there are the lines "Often have Your eyes, offended, / Gazed upon the sinner's fall."  The second of these two lines is sung to this musical phrase:

The "sinner's fall" is sung to a descending phrase, musically representing the "fall."