Recently I was reading St. Clement's letter to the Corinthians. Clement was the Pope and wrote to Corinth to try and settle some problems there. This is a beautiful thing that he said about the blood of Christ:
"Let us fix our gaze upon the Blood of Christ and understand how precious it is to the Father, because, poured out for our salvation, it brought to the whole world the grace of conversion."
(Quoted from the Ancient Christian Writers series.)