[The author here adds: “What other meaning then can we attach to the words, ‘for the chorus to respond,’ but this, that the choir is to make responses with the singer? And thus we must suppose that not this only, but other Psalms were chanted, though they have received different titles, probably for the sake of variety to relieve weariness: for this Psalm was not the only one held worthy of choral responses, since it is not the only one which relates to our Lord’s Passion. If indeed there is any other reason for so great a variety in the titles, by which it can be shown that all the Psalms which are distinguished in their titles are so marked, as that the title of no one of them can be fitted to another, I must confess that I could not discover it, though I tried long; and whatever I have read on the subject in the works of my predecessors has not satisfied my hopes, or, perhaps, my slowness of apprehension. I will therefore explain in allusion to what mystery the words, ‘for the choir to respond,’ that is, that the singer should be answered by a choir, seem to me to be used.”—C.]