Ambrose of Milan : Therefore, let us transcend the works of the world, so that we may be able to see God face to face. Ascend to the mountain that proclaims Zion. If the one who proclaims Zion ascends to the mountain, how much more the one who proclaims Christ and the risen Christ? Perhaps many will see him in the body; for we have known Christ according to the flesh: but now we no longer know him. — Commentary on Luke, Book 7 Cyril of Jerusalem : For in the power of the Holy Spirit, by the will of the Father and the Son, Peter stood with the Eleven and, lifting up his voice (according to the text, "Lift up your voice with strength, you who bring good tidings to Jerusalem"), captured in the spiritual net of his words about three thousand souls. So great was the grace that worked in all the apostles together, that, out of the Jews … this great number believed, were baptized in the name of Christ and continued steadfast in the apostles' doctrine and in the prayers. — Catechetical Lecture 17:21 Gregory the Dialogist : If the Lord admonishes a prophet to rise, does he dare to preach the Lord who lies fallen through the lapse of wickedness? For this is why every preacher is commanded through Isaiah: "Go up onto a high mountain, you who evangelize Zion" (Isa. 40:9). The high mountain is the perfection of teaching and of works. Let him therefore rise who is commanded to anoint the king; let him stretch himself toward lofty things. Let him rise in lofty work, let him rise in lofty contemplation, let him rise in the wisdom of the word, let him rise in the power of charity. Indeed, he who is anointed through preaching is so great that he can scarcely be reached even from the heights. And perhaps Paul was able to anoint him because he says: "Our conversation is in heaven" (Phil. 3:20). He was able to anoint him because he had raised himself to the secrets of the third heaven and heard hidden words in paradise. Because, therefore, the Lord Jesus ought to be preached sublimely by the sublime, the prophet is commanded to rise, because he is ordered to anoint the one through whom Christ himself is signified. Lofty indeed, nay most lofty, is this virtue of perfect conduct, yet it is perfectly accomplished by many. Great indeed is this sublimity, yet holy Church possesses many who are sublime. — Commentary on 1 Kings, Book 6, Chapter 3 Jerome : (V. 9 and following) Ascend to the high mountain, you who bring good news to Zion; lift up your voice with strength, you who bring good news to Jerusalem. Lift it up, do not fear; say to the cities of Judah, 'Here is your God!' See, the Lord God comes with might, and His arm rules for Him. See, His reward is with Him, and His recompense accompanies Him. He tends His flock like a shepherd; He gathers the lambs in His arms and carries them close to His heart; He gently leads the nursing ewes. LXX: Go up on a high mountain, you who bring good tidings to Zion; lift up your voice with strength, you who bring good tidings to Jerusalem. Lift it up, do not be afraid; say to the cities of Judah, 'Behold your God! Behold, the Lord God shall come with a strong hand, and His arm shall rule for Him; behold, His reward is with Him, and His work before Him. He will feed His flock like a shepherd; He will gather the lambs with His arm, and carry them in His bosom, and gently lead those who are with young.' The choir of the Apostles is commanded to ascend to the preaching of all flesh, which is going to see the salvation of God, and to dwell in high places, about to speak about great things. Moreover, the Hebrew and other interpreters put it in the feminine gender, so that they say, 'you who preach the gospel to Zion and you who preach the gospel to Jerusalem.' This word is ambiguous according to the Greeks, so that we can understand it as either the one who announces or the one to whom the announcement is made. Therefore, whether the word of God and the saving word of the Lord are announced to Zion and Jerusalem: for the law went forth from Zion, and the word of the Lord from Jerusalem (Isaiah II, 3); or whether it is announced to them through the Apostles, they ought to ascend to the heights and pass over the mountains. And in a wondrous way, even though Zion itself is a mountain, as Scripture says: Mount Zion, in which you have dwelt (Psalm LXXIII, 3): it is commanded to ascend another, higher mountain, from which the prince of Tyre was wounded. And because the teachings of the Apostles were going to be greatly opposed, and they were going to be led before governors and tribunals, it is joined, exalt, do not be afraid: say to the cities of Judea, namely the synagogues and the people of the Jews, of whom the Lord spoke: I have come only for the lost sheep of the house of Israel (Matthew 15:24). And the Apostle Paul says: It was necessary for the word of God to be proclaimed to you first (Acts 13:46). But what is it that they are commanded to say? Behold your God, whom you have always awaited: Behold the Lord God shall come in strength, whom you have despised coming in humility. And his strength shall rule, who first took the form of a servant, being obedient to the Father even unto death (Philippines III). Behold his reward is with him, and his work before him (Isaiah XL, and LXII). According to what he himself says in the Gospel: For the Son of Man shall come in the glory of his Father and he shall render to every man according to his works (Matthew XVI, 17). As a shepherd, he will feed his flock. This one who will come later in majesty, first takes on the form of a shepherd, and he says about himself: I am the good shepherd, and I know my sheep, and they know me, and I lay down my life for my sheep (John 10:14, 15). About this, the Father speaks in Zechariah: I will strike the shepherd; and the sheep will be scattered (Zechariah 13:7). In his arm, he says, he will gather the lambs; not bulls, and rams, and goats, and large sheep, of whom through Ezekiel (Chapter 34) he threatens that they should feed on milk and be covered with wool, and crush the weak flock, but rather the still tender lambs, and those new to Christ's infancy, who have recently been reborn in baptism, of whom the Lord himself spoke to Peter: Feed my lambs (John 21:15). And in the same Ezekiel it is written: I will raise up for them a single shepherd, and he will feed them, my servant David; he will be their shepherd, and I the Lord will be their God, and David will be their prince in their midst. I the Lord have spoken, and I will establish a covenant of peace with David (Ezekiel 34:23-25). It should be considered that after many generations, David, in contrast to the greedy and unworthy shepherds, says that our Lord, who is of the lineage of David, will rise up, gather the lambs, and nurture them in his bosom, and he himself will carry the lambs or sheep on his shoulder. As we read in the Gospel, that he carried the wandering sheep and the one remaining from the usual flock on his shoulders to the sheepfold (Luke 15). We can say that the pregnant ewes are the Apostles and the Apostolic men and all the doctors of the Church, who give birth to the salvation of many, and they say with the Apostle: My little children, whom I travail in birth again until Christ be formed in you (Galatians 4:19). The Hebrews assert, and there is no doubt among them about this matter, that the Holy Spirit is called in their language by the feminine gender, that is, the Shekinah. And that which is said in the sixty-seventh psalm: The Lord will give the word to the preachers with great power: they understand it thus: The Lord will give the word to the preachers with great power (Ps. 122:3): namely, to those souls who have received the Holy Spirit. Also this: As the eyes of a handmaid are in the hands of her mistress, so the soul is in the hands of the Holy Spirit, both a handmaid and a mistress. But also in the Gospel written according to the Hebrews, which the Nazarenes read, the Lord speaks: Now my mother took me up, the Holy Spirit. But no one should be scandalized by the fact that in the Hebrew language the Spirit is referred to as feminine, while in our language it is referred to as masculine, and in Greek it is referred to as neutral. For in divinity there is no gender. And therefore, in the three principal languages in which the title of the Lord's Passion is written, it is referred to in three genders, so that we may understand that there is no gender that is different. — Commentary on Isaiah Theodoret of Cyrus : It is the chorus of the apostles that the prophetic text raises here. It is precisely for this reason that after expressing this exhortation in the singular the text shifts into the plural and says, "Lift up [the voice], do not fear." In the same way, in his turn, Christ our Master said to the apostles, "Do not fear those who kill the body but cannot kill the soul." And again, after bringing them out from the prison, he bade them to proclaim quite freely the words of this life. Moreover, he calls "mountain" the summit of the knowledge of God. — COMMENTARY ON Isaiah 12:40.9