"O God, My Faithful God"

I noticed a couple small features specific to Lutheran Worship's version of "O God, My Faithful God."  In Lutheran Worship, the hymn is sung to the tune "Was frag' ich nach der Welt," but in The Lutheran Service Book, it's sung to the tune "O Gott, du frommer Gott."

Here are the first two phrases of "Was frag' ich nach der Welt":

The first two lines are "O God, my faithful God, / True fountain ever flowing."  "Flowing" is sung with a melisma (F# E D), musically giving a sense either of movement or of the duration of "ever."

The second two phrases:

In the third verse, the text here is "Guard me lest idle speech / May from my lips be falling."  "Falling" is sung to a descending group of notes (C# B A), musically giving a sense of its meaning.  That it's sung with a melisma emphasizes this.