It is as if God the Father sent upon the earth a purse full of his mercy. This purse was burst open during the Lord’s passion to pour forth its hidden contents—the price of our redemption. It was only a small purse, but it was very full. As the Scriptures tell us: “A little child has been given to us, but in him who dwells with the fullness of the divine nature.” The fullness of time brought with it the fullness of divinity. God’s Son came in the flesh so that mortals could see and recognize God’s kindness. When God reveals his humanity, his goodness cannot possibly remain hidden…How could he have shown his mercy more clearly than by taking on himself our condition? We should stop thinking of our own sufferings and remember what he has suffered. The lesser he became through his human nature, the greater was his goodness; the more he lowered himself for me, the dearer he is to me…He has given us a most wonderful proof of his goodness by adding humanity to his own divine nature.

—Bernard of Clairvaux, Sermon 1 for Epiphany

When Isaac himself carried the wood for the sacrifice of himself, in this, too, he prefigured Christ our Lord, who carried his own cross to the place of his passion. On this mystery much had already been foretold by the prophets: “And his government shall be upon his shoulders.” Christ, then, had the government upon his shoulders when he carried his cross with wonderful humility. Not unfittingly does Christ’s cross signify government: by it the devil is conquered and the whole world recalled to the knowledge and grace of Christ.

—Caesarius of Arles, Sermon 84.3