Christ Jesus is the ground of faith,Who was made flesh and suffered death;All those who trust in Him aloneAre built on this chief cornerstone.
As he was saying these words, I was playing the tune ("St. Crispin") in my head. I realized that the last syllable of "cornerstone" is sung to the tonic note, and because this is the musical center, there's a sense of that firm foundation. Here's the musical phrase for the last line: