St Francis at one time being grievously tormented with a disease in his eyes, the Cardinal Ugolino, protector of his Order, who loved him dearly, wrote to him to come to Rieti, where there were excellent oculists. St Francis, having received the Cardinal's letter, set off first to San Damiano, where was Sister Clare, the devout spouse of Christ, to give her some spiritual consolation, intending afterwards to go on to the Cardinal. On arriving at San Damiano, the following night his eyes grew so much worse that he could not see the light, and was obliged to give up going any further. Then Sister Clare made him a little cell of reeds, in order that he might repose the better; but St Francis, owing partly to the pain he suffered, and partly to the multitude of rats, which much annoyed him, could rest neither day or night. After suffering for several days this pain and tribulation, he began to think that it was sent to him by God as a punishment for his sins, and he thanked the Lord in his heart and with his lips, crying out with a loud voice: "My God, I am worthy of this, and even worse. My Lord Jesus Christ, thou Good Shepherd, who hast shown thy mercy to us poor sinners in the various bodily pains and sufferings it pleaseth thee to send us; grant to me, thy little lamb, that no pain, however great, no infirmity nor anguish, shall ever separate me from thee." Having made this prayer, a voice came from heaven, which said: "Francis, if all the earth were of gold, if all the seas and all the fountains and all the rivers were of balm, if all mountains, all hills, and all rocks were made of precious stones, and if thou couldst find a treasure as much more precious again as gold is more precious than earth, and balm than water, and gems than mountains and rocks, if that precious treasure were offered to thee in the place of thy infirmity, wouldst thou not rejoice and be content?" St Francis answered: "Lord, I am unworthy of such a treasure." And the voice of God said again: "Rejoice with all thy heart, Francis, for such a treasure is life eternal, which I have in keeping for thee, and even now promise to thee; and this thine infirmity and affliction is a pledge of that blessed treasure." Then was St Francis filled with joy at so glorious a promise; and calling his companion, he said to him: "Let us go to the Cardinal." He humbly took leave of Sister Clare, after having comforted her with holy words, and took the road to Rieti. When he approached the town, such a multitude came out to meet him, that he would not go into the city, but went to a church which was about two miles off. But the people, hearing where he was gone, went thither to see him; so that the vine which surrounded the church was greatly injured, and all the grapes were gathered; at which the priest, to whom it belonged, was very grieved in his heart, and repented of having received St Francis in his church. The thought of the priest being revealed to the saint, he called him to him and said: "Dearest father, tell me, how many measures of wine does this vine produce when the year is a fertile one?" He answered: "Twelve measures." Then said St Francis: "I pray thee, father, have patience and endure my presence here a few days longer, as I find great rest in this church; and, for the love of God and of me his poor servant, let the people gather the grapes off thy vine; for I promise thee, in the name of my Saviour Jesus Christ, that it shall produce every year twenty measures of wine." And St Francis remained there for the benefit of the souls of all who went to see him, for many went away filled with divine love, and gave up the world. The priest, having faith in the promise of St Francis, left the vineyard open to all those who came to see him. And, wonder of wonders! although the vine was entirely ruined, so that there scarcely remained, here and there, a few small bunches of grapes, when the time of vintage arrived, the priest gathered the few bunches which were left, and put them into the winepress; and according to the promise of St Francis, these few little bunches did not fail to produce twenty measures of excellent wine. This miracle teaches us that as, in consequence of the merits of St Francis, the vine, though despoiled of its grapes, produced an abundance of wine, so in the same way many Christians, whose sins had made them barren of virtue, through the saint's preaching and merits, have often come to abound in the good fruit of repentance.