In the first verse, the text here is "Let them flow in ceaseless praise, / Let them flow in ceaseless praise." (The "them" are "my moments and my days" from the previous line.) In the first phrase, the words "ceaseless praise" are sung with melismas (C Bb Bb A | A G), and since the words are stretched out, there's a sense of this duration.
In the third verse, the text here, referring to "my lips" in the previous line, is "Filled with messages from Thee, / Filled with messages from Thee." In both phrases, "messages" is sung with a melisma (D C C Bb and A Bb G F, respectively), and since there's an extra syllable, there's a sense of the abundance of being "filled."
