And when he has found the sheep, he lays it on his shoulders, rejoicing. He laid the sheep on his shoulders when he himself bore our sins by taking on our human nature... Our lives are his joy. When we are brought back to heaven, we complete the solemn feast of his delight. I tell you that there will be the more joy in heaven over one sinner who repents than over ninety-nine righteous persons who need no repentance.
Gregory the Great