"Arise and Shine in Splendor"

Last week, I transcribed the lyrics for "Arise and Shine in Splendor," and I noticed something about the first phrase.  In hindsight, it's obvious, but when sung to the melody "O Welt, ich muss dich lassen," the first part of the first line ("Arise and shine") ascends as if to musically represent the rising:

The same feature is present for the beginning of the fourth and fifth verses too:  "Lift up your eyes" and "Your heart will leap."