The "fullness of Christ" is a concept that can be interpreted in several aspects...
The "fullness of Christ" is a concept that can be interpreted in several aspects.
1) The fullness of the presence of our Lord Jesus Christ. This is, in fact, the reason why Christians gather in the Church, as the Lord Himself said about it: "For where two or three are gathered together in My name, I am there in the midst of them" (Matthew 18:20). Furthermore, the Lord says about this: "If anyone loves Me, he will keep My word; and My Father will love him, and We will come to him and make Our home with him" (John 14:24). The Greek word can be translated as a) dwelling, b) rest, c) abiding. It is speaking of the presence of God in a person's life.
2) The Apostle Paul in the Epistle to the Ephesians says: "till we all come to the unity of the faith and of the knowledge of the Son of God, to a perfect man, to the measure of the stature of the fullness of Christ" (Ephesians 4:13). The last words can also be translated as "to the measure of the age of the fullness of Christ." The Apostle is saying that the life of a Christian is directed towards being able, following the apostle himself, to say: "it is no longer I who live, but Christ lives in me" (Galatians 2:20). The apostle also says about this: "Imitate me, just as I also imitate Christ" (1 Corinthians 11:1).
The fullness of Christ, undoubtedly, cannot be adequately described in words; however, these two aspects allow us to identify the main point.
As for the question of how to enter into this fullness, the answer follows from what has been said above. The "gates" through which we can enter the fullness of Christ is the Church. In it, the possibility of prayerful communion with Christ and participation in the sacraments of the Church is revealed to us, where He Himself comes into our lives according to His promise. Also, a fundamental condition for entering into the fullness of Christ is living according to His commandments. But most importantly: since it would be naive to try to force Him into the fullness of communion with us, we must first of all ask this of Him Himself. Many Christians resort, in addition to this, to the prayers of other members of the Church, first and foremost the Most Pure Mother of God.
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1:16 I cease not - In all my solemn addresses to God. To give thanks for you, making mention of you in my prayers - So he did of all the churches, Col 1:9.
1:17 That the Father of that infinite glory which shines in the face of Christ, from whom also we receive the glorious inheritance, Eph 1:18, may give you the Spirit of wisdom and revelation - The same who is the Spirit of promise is also, in the progress of the faithful, the Spirit of wisdom and revelation; making them wise unto salvation, and revealing to them the deep things of God. He is here speaking of that wisdom and revelation which are common to all real Christians.
1:18 The eyes of your understanding - It is with these alone that we discern the things of God. Being first opened, and then enlightened - - By his Spirit. That ye may know what is the hope of his calling - That yemay experimentally and delightfully know what are the blessings which God has called you to hope for by his word and his Spirit. And what is the riches of the glory of his inheritance in the saints - What an immense treasure of blessedness he hath provided as an inheritance for holy souls.
1:19 And what the exceeding greatness of his power toward us who believe - Both in quickening our dead souls, and preserving them in spiritual life. According to the power which he exerted in Christ, raising him from the dead - By the very same almighty power whereby he raised Christ; for no less would suffice.
1:20 And he hath seated him at his own right hand - That is, he hath exalted him in his human nature, as a recompence for his sufferings, to a quiet, everlasting possession of all possible blessedness, majesty, and glory.
1:21 Far above all principality, and power, and might, and dominion - That is, God hath invested him with uncontrollable authority over all demons in hell, all angels in heaven, and all the princes and potentates on earth. And every name that is named - We know the king is above all, though we cannot name all the officers of his court. So we know that Christ is above all, though we are not able to name all his subjects. Not only in this world, but also in that which is to come - The world to come is so styled, not because it does not yet exist, but because it is not yet visible. Principalities and powers are named now; but those also who are not even named in this world, but shall be revealed in the world to come, are all subject to Christ.
1:22 And he hath given him to be head over all things to the church - An head both of guidance and government, and likewise of life and influence, to the whole and every member of it. All these stand in the nearest union with him, and have as continual and effectual a communication of activity, growth, and strength from him, as the natural body from its head.
1:23 The fulness of him that filleth all in all - It is hard to say in what sense this can be spoken of the church; but the sense is easy and natural, if we refer it to Christ, who is the fulness of the Father.