Catena Aurea on Luke 23:38–43: Gregory the Great

On the cross nails had fastened his hands and feet, and nothing remained free from torture, but his heart and tongue. By the inspiration of God, the thief offered to Him the whole which he found free, that as it is written, With the heart he might believe unto righteousness, with the mouth he might confess unto salvation. (Rom. 10:10.) But the three virtues which the Apostle speaks of, (1 Cor. 13:13.) the thief suddenly filled with grace both received and preserved on the cross. He had faith, for example, who believed that God would reign whom he saw dying equally with himself. He had hope who asked for an entrance into His kingdom. He preserved charity also zealously in his death, who for his iniquity reproved his brother and fellow-thief, dying for a like crime to his own.