Jeremiah 15:19

Let us catch them then by our mode of life; and by these souls let us build up the Church, and of these let us amass our wealth. There is nothing to weigh against a soul, not even the whole world. So that although thou give countless treasure unto the poor, thou wilt do no such work as he who converteth one soul. "For he that taketh forth the precious from the vile shall be as my mouth:" so He speaks. A great good it is, I grant, to have pity on the poor; but it is nothing equal to the withdrawing them from error.

Words full of gentleness and meekness, even as also He Himself used to speak, saying to them that were insulting Him, "I have not a devil;" and again, "If I have spoken evil, bear witness of the evil." If thou also speak in this way; if thou speak for thy neighbor's amendment, thou wilt obtain a tongue like that tongue. And these things God Himself saith; "For he that bringeth out the precious from the vile, shall be as my mouth;" such are His words. When therefore thy tongue is as Christ's tongue, and thy mouth is become the mouth of the Father, and thou art a temple of the Holy Ghost, then what kind of honor could be equal to this?

"Therefore thus says the Lord: If you return, then I will restore you." These things again are said to each one whom God shall exhort to return to him. And a mystery seems to me to be indicated here in the "I will restore you." No one is restored to a place in which he has in no way ever been, but the restoration is to what is one's own. For instance, if a limb of mine becomes dislocated, the physician tries to make a restoration of what is dislocated. When someone comes to be outside his homeland, whether justly or unjustly, and then recovers the ability to be again in the homeland according to the laws, he has been restored to his own homeland. Understand the same for me also in the case of a soldier who has been cast out from his own ranks and is restored. He says, then, here to us who have turned away, that if we return, he will restore us. For the end of the promise is such, as is written in the Acts of the Apostles in the words, "until the times of the restoration of all things which God spoke by the mouth of his holy prophets from of old," in Christ Jesus, to whom is the glory and the might unto the ages of the ages. Amen.

(Verse 19 onwards) Because of this, the Lord says: If you turn back, I will restore you, and you shall stand before me. And if you separate the precious from the vile, you shall be like my mouth. They will turn to you, but you shall not turn to them. And I will make you to this people a fortified bronze wall; and they will fight against you, but they shall not prevail, for I am with you to save you and deliver you, says the Lord. And I will deliver you from the hand of the wicked, and redeem you from the hand of the strong (or the pestilent). It is clear that the things mentioned do not pertain to Jerusalem, but rather the Prophet said them. To whom the Lord responded, if you turn the people away from sins, I will turn you from tribulation to joy, and you will stand before my face, just as the Angels stand in the presence of God, seeing His face daily. And if you separate the precious from the vile, you will be like my mouth. Do not think, he says, that there is no reward for good works: if you separate even my saints from the number of sinners with your words, you will be like my mouth, and you will be connected to my commandments. For indeed they should be your imitators, and not you theirs. Do not be dismayed, and say: Why has my pain become perpetual, and my wound strong or hopeless, so that I despair of being able to be healed. For I will give you like a wall of bronze, strongest, so that you may resist the adversary with all strength; and you will have me as a helper and I will free you from the hand of the wicked or the pestilence, and I will redeem you, either with my own blood or for now with my help. Let us consider what reward the teaching of a doctor has, if he is able to free someone from error and lead them out of the number of sinners.

Consider to what a dignity one exalts himself who esteems others' salvation to be of great importance. Such a person is imitating God as far as lies within the power of humankind. Hear what God says speaking through his prophet: "He who separates the worthy from the vile shall be as my mouth." What God says is that one who is eager to save a brother who has fallen into careless ways, one who hastens to snatch his brother from the jaws of the devil, that person imitates me as far as lies within human power. What could equal that? This is greater than all good deeds. This is the peak of all virtue.