Here's the version from the 1996 Disciples of Christ Chalice Hymnal; it's not vey different from the others, but at least it shows the song has not wholly disappeared from its land of origin (which was not RC/Qk/UU) I've underlined the places where it differs materially from the GIA's text above...

My Life Flows On (Chalice)
WORDS and MUSIC: Robert Lowry, 1869, alt.

   1. My life flows on in endless song,
      above earth's lamentation.
      I hear the clear, though far off hymn
      that hails a new creation.

          CHORUS:
          No storm can shake my inmost calm,
          while to that Rock I'm clinging.
          Since love is Lord of heav'n and earth,
          how can I keep from singing?


   2. Through all the tumult and the strife,
      I hear that music ringing.
      It finds an echo in my soul.
      How can I keep from singing?
      CHORUS

   3. What though my joys and comfort die?
      I know my Savior liveth.
      What though the darkness gather round?
      Songs in the night he giveth.
      CHORUS

   4. The peace of Christ makes fresh my heart,
      a fountain ever springing!
      All things are mine since I am his!
      How can I keep from singing?
      CHORUS

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Haruo