"My Song Is Love Unknown"

I wrote about the Biblical sources for "My Song Is Love Unknown" years ago, but recently, I was thinking about the hymn and noticed a similarity between it and part of a Psalm.  The hymn's first verse ends with the lines "Oh, who am I / That for my sake / My Lord should take / Frail flesh and die?"  In essence, this asks the same question as Psalm 144:3:  "O Lord, what is man that you regard him, or the son of man that you think of him?"  The hymn considers this question in the context of the crucifixion.