The Catechism of Trent: ARTICLE VI
“HE ASCENDED INTO HEAVEN, SITTETH AT THE RIGHT HAND OF GOD THE FATHER ALMIGHTY”
The pastor will hence learn that this mystery should be explained with the greatest diligence; and that he should take care that the people not only perceive it with faith and understanding, but that they also strive as far as possible, with the Lord’s help to reflect it in their lives and actions.
Neither did He ascend into heaven solely by the exercise of His supreme power as God, but also by virtue of the power which He possessed as man. Although human power alone was insufficient to accomplish this, yet the virtue with which the blessed soul of Christ was endowed was capable of moving the body as it pleased, and His body, now glorified, readily obeyed the behest of the soul that moved it. Hence, we believe that Christ ascended into heaven as God and man by His own power.
Moreover the other Articles of the Creed which regard Christ the Lord show His great humility and lowliness. Nothing can be conceived more humble, nothing more lowly, than that the Son of God assumed our weak human nature, and suffered and died for us. But nothing more magnificently, nothing more admirably, proclaims His sovereign glory and divine majesty than what is contained in the present and in the preceding Article, in which we declare that He rose from the dead, ascended into heaven, and sits at the right hand of God the Father.
First of all, He ascended because the glorious kingdom of the highest heavens, not the obscure abode of this earth, presented a suitable dwelling place for Him whose body, rising from the tomb, was clothed with the glory of immortality.
He ascended, however, not only to possess the throne of glory and the kingdom which He had merited by His blood, but also to attend to whatever regards our salvation.
Again, He ascended to prove thereby that His kingdom is not of this world. For the kingdoms of this world are earthly and transient, and are based upon wealth and the power of the flesh; but the kingdom of Christ is not, as the Jews expected, earthly, but spiritual and eternal. Its resources and riches, too, are spiritual, as He showed by placing His throne in the heavens, where they are counted richer and wealthier who seek most earnestly the things that are of God, according to these words of St. James: Hath not God chosen the poor in this world, rich in faith, and heirs of the kingdom which God hath promised to them that love him?
He also ascended into heaven in order to teach us to follow Him thither in mind and heart. For as by His death and Resurrection He bequeathed to us an example of dying and rising again in spirit, so by His Ascension He teaches and instructs us that though dwelling on earth, we should raise ourselves in desire to heaven, confessing that we are pilgrims and strangers on the earth, seeking a country and that we are fellow�citizens with the saints, and the domestics of God, for, says the same Apostle, our conversation is in heaven
He also ascended into heaven, according to the Apostle, that he may appear in the presence of God f or us, and discharge for us the office of advocate with the Father. My little children, says St. John, these things I write to you, that you may not sin. But if any man sin, we have an. advocate with the Father, Jesus Christ the just: and he is the propitiation for our sins. There is nothing from which the faithful should derive greater joy and gladness of soul than from the reflection that Jesus Christ is constituted our advocate and the mediator of our salvation with the Eternal Father, with whom His influence and authority are supreme.
Finally, by His Ascension He has prepared for us a place, as He had promised, and has entered, as our head, in the name of us all, into the possession of the glory of heaven.” Ascending into heaven, He threw open its gates, which had been closed by the sin of Adam; and, as He foretold to His disciples at His Last Supper, secured to us a way by which we may arrive at eternal happiness. In order to give an open proof of this by its fulfilment, He introduced with Himself into the mansions of eternal bliss the souls of the just whom He had liberated from hell.
In the next place, the Ascension of Christ into heaven contributes much to confirm our hope. Believing that Christ, as man, ascended into heaven, and placed our nature at the right hand of God the Father, we are animated with a strong hope that we, as members, shall also ascend thither, to be there united to our Head, according to these words of our Lord Himself: Father, I will that where I am, they also whom thou hast given me may be with me
Another most important advantage is that He has taken our affections to heaven and inflamed them with the Spirit of God; for most truly has it been said that where our treasure is, there also is our heart. And, indeed, were Christ the Lord still dwelling on earth, the contemplation of His human nature and His company would absorb all our thoughts, and we should view the author of such blessings only as man, and cherish towards Him a sort of earthly affection. But by His Ascension into heaven He has spiritualised our affection and has made us venerate and love as God Him whom, on account of His absence, we see only in thought. This we learn in part from the example of the Apostles, who while our Lord was personally present with them, seemed to judge of Him in some measure in a human light; and in part from these words of our Lord Himself: It is expedient to you that I go. The imperfect affection with which they loved Christ Jesus when present had to be perfected by divine love, and that by the coming of the Holy Ghost; and therefore He immediately subjoins: If I go not, the Paraclete will not come to you.
Finally, what we have already taught of the mystery of His death and Resurrection the faithful should deem not less true of His Ascension. For although we owe our Redemption and salvation to the Passion of Christ, whose merits opened heaven to the just, yet His Ascension is not only proposed to us as a model, which teaches us to look on high and ascend in spirit into heaven, but it also imparts to us a divine virtue which enables us to accomplish what it teaches.