The first two things I noticed are in this section:
Mama, mama, forget your piesAfter "Your flag is flying full," the lines have half as many syllables, corresponding to the moiety of the flag flying "At half mast" in the next line. The first four lines have between six and nine syllables, but then the syllable count drops to anywhere between three and five before the final line of seven syllables (although "And" has a melisma when this section is repeated, making that line eight syllables).
Have faith they won't get cold
And turn your eyes to the blood-shot sky
Your flag is flying full
At half mast
For the matadors
Who turned their backs
To please the crowd
And all fell before the bull
I also found some connections between the melody and the lyrics of that last line. If my counting is right, the "all" lasts for a whole measure, indicating the multitude of matadors who fell. The phrase "all fell before" descends (E D# C# B), musically illustrating their falling. "The bull" is sung to C# notes, so even musically, it's higher than the matadors, who "fell before the bull" to a B note.
The last thing I noticed is an implication of the contrast between
Red was the color of his blood flowing thin
Pallid white was the color of his lifeless skin
Blue was the color of the morning sky
and
Black and white were the figures that recorded himObviously the major difference between these two is that the first has various colors where the second has only "black and white," but what I realized is that this contrast illustrates the change in the matador. Although he's dying in the first section, he is still alive, and the variety of colors represents the potentiality of his life. In the second section, where he's dead, the repeated "black and white" illustrates the immutability of death. The matador has no more agency, so where before there were changing colors, now there's only the repeated "black and white."
Black and white was the newsprint he was mentioned in
Black and white was the question that so bothered him
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This is the second post I've written about "Requiem for the Masses." Here's one I wrote three years ago.