"The law of Thy mouth, O Lord, is good unto me, I keep Thy commandments.'' Thou hast Thyself said that Thou art one with the Father. Because Peter believed this, he received the keys of the kingdom of heaven, and without anxiety for himself forgave sins. Judas, because he believed not this, strangled himself with the cord of his own wickedness. O the hard stones of unbelieving words! O the unseemly cord of the betrayer, and the still more hideous purchase-money of the Jews! O hateful money wherewith either the just is bought for death, or sold ! Joseph was sold, Jesus Christ was bought, the one to slavery, the Other to death. O detestable inheritance, O deadly sale, which either sells a brother to suffering or sets a price on the Lord to destroy Him, the Purchaser of the salvation of all.
-- Saint Ambrose of Milan from "On the Holy Spirit, Book III"