Lord, I have cried to you, hear me. This is a prayer we can all say. This is not my prayer, but that of the whole body of Christ. Rather, it is said in the name of his body. When Christ was on earth he prayed in his human nature, and prayed to the Father in the name of his body, and when he prayed drops of blood flowed from his whole body. So it is written in the Gospel: Jesus prayed with earnest prayer, and sweated blood. What is this blood streaming from his whole body but the martyrdom of the whole Church?
From a commentary on the psalms by Saint Augustine, bishop