The spiritual life of the Church is given to men in the sacraments. The sacraments are called the holy mysteries, and the entire life of the Church is considered to be mystical and sacramental.
The new life in Christ, the genuine life of God, is given to man in baptism, the new birth and new creation of man in Christ by the Spirit of God. In baptism the person who rejects Satan and all of his evil works and accepts Christ and the gift of eternal life, dies and rises again with Jesus to “newness of life.”
Do you not know that all of us who have been baptized into Christ Jesus were baptized into His death? We were buried therefore with Him by baptism into death, so that as Christ was raised from the dead by the glory of the Father, we too might walk in newness of life. [...] So you also must consider yourselves as dead to sin and alive to God in Christ Jesus (Rom 6:3-11; Cf. also Col 2-3, Gal 3).
The new life in Christ Jesus given in baptism—a perpetually dying and rising daily with Jesus—is made possible in man by “the seal of the gift of the Holy Spirit” in the mystery of chrismation (Cf. 2 Cor 1:22, Eph 1:13). Chrismation follows baptism, and is essentially connected to it, as the Holy Spirit comes with Christ, Pentecost comes with Easter, and life comes with birth. There is no new life in the new humanity of divine childhood in Jesus without the life-creating Spirit of God. It is the Holy Spirit in chrismation who makes possible and powerful the spiritual life into which men are born in Christian baptism.
The new life in Christ and the Holy Spirit in the Church is nourished and sustained in the mystery of the eucharist—Holy Communion. The “mystical supper of the Son of God” is the center of the spiritual life. For Christians there is no life at all without it:
I am the bread of life… if any one eats of this bread, he will live forever; and the bread which I shall give for the life of the world is my flesh. Truly, truly I say to you, unless you eat the flesh of the Son of Man and drink His blood, you have no life in you; he who eats my flesh and drinks my blood has eternal life, and I will raise him up on the last day. For my flesh is food indeed and my blood is drink indeed. He who eats my flesh and drinks my blood abides in me and I in him. As the living Father sent me, and I live because of the Father, so he who eats me will live because of me… he who eats this bread will live forever (Jn 6:32ff).
When a person falls away from the life of God in the Church, he or she may be reunited to Christ by the mystery of reconciliation through penitential confession. The abundant mercy of God abides in the Church by the presence of Christ, and the Lord who “desires not the death of a sinner” but that he might “turn from his wickedness and live” (Ez 18:32, 33:14) will forgive those who come to Him in repentance (Cf. Jn 6:37). Continual repentance for sin is a central element in the spiritual life of men who choose life in God, but continue, inevitably, to sin.
If we say we have no sin, we deceive ourselves and the truth is not in us. If we confess our sins, Christ is faithful and just, and will forgive our sins and cleanse us from all unrighteousness. If we say we have not sinned, we make Him a liar and His word is not in us (1 Jn 1:8).
In this life still bound by the sin of the world, man inevitably suffers and dies. His outward nature is wasting away while his new nature in Christ is being perfected. The mystery of the anointing of man’s suffering soul and body is the sanctification of man’s “perishable nature” that his “mortal nature” might “put on immortality” (l Cor 15:51ff). Through holy unction a person is given the grace of the Spirit to make his suffering and death an act of victory and life.
If we have died with Him, we shall also live with Him; if we suffer, we shall also reign with Him… (2 Tim 2:11; Cf. Jas 4:13ff).
In this life as well, God has created human beings in His divine image and likeness as male and female. The union in love between one man and one woman forever is the created expression of the perfect love of God for His creatures. The mystery of marriage is the human image of the “great mystery” of “Christ and the Church” (Eph 6:21-33). In the sacrament of marriage, human love is made eternal and divine by the grace of Christ’s Spirit. There is no parting in death, but fulfillment in the Kingdom of God.
All of the sacramental mysteries of the Church are effected in the Church through the sacrament of the ordained priesthood. The bishops and priests are the ministers within the community who guarantee the reality of the mystical life of the Church in all times and places. Through the ordained ministers within the communion of the Church, Christ Himself is present and powerful in the fullness of His saving activity.