Though the elements of Christian worship are the same as those in the Old Testament, there are two new factors at the very heart of the New Testament that bring about a decisive reorientation. First, Christian worship is through God the Son; second, it is worship in the Holy Spirit.
Worship Through God the Son
The first of these new factors is that Christian worship is in its very core and essence the worship of God the Father through God the Son. The elements remain; the Christological orientation is new. If space allowed, one might easily work through the data afresh to show this truth. In this conclusion, a few indications must suffice. Worshipers now stand in a personal relation of sonship to God on the basis of adoption in Christ. They pray in the name of the Son (John 16:23). The works of God in the Son are the theme of their praise (Eph. 1:3–14). Their plea for forgiveness is that Christ gave Himself as a perfect sacrifice for sin (1 John 1:7–9). Their confession is the confession of Jesus as Lord (1 Cor. 12:3). The Scriptures, both the Old Testament and the New Testament, testify of Christ (John 5:39). Preaching is the setting forth of Christ in his revealing and reconciling work (2 Cor. 5:18–21). The Lord’s Supper is the Passover of the new and final exodus, the showing forth of the one sacrifice for sin (1 Cor. 11:26). Christian almsgiving acquires a new ground and basis in the light of God’s gift in Christ (2 Cor. 9:15) and of the giving of all gifts to him (Matt. 25:31–46). The suitability of worship at various points in life rests in the fact that all Christian life is lived in the Lord (Rom. 14:8). The decisive point, then, is not that new forms are provided or new levels of devotion ensured, but that God has come in person and fulfilled his work of grace. With this focus, worship is given a depth and content that it could hardly achieve in the time of Old Testament and Jewish expectation.
Worship in the Holy Spirit
The second of the new factors in Christian worship is that in its very core and essence it is the worship of God the Father through God the Son and in and by God the Holy Spirit. True worship has always been both spiritual and in the Spirit, but as Jesus himself showed, his own ministry brought with it a specific coming of the Spirit that makes possible in fullness the worship that is in spirit and in truth. Prayer occurs with the assistance of the Spirit (Rom. 8:26–27). Praise is rejoicing in the Spirit (Eph. 5:18–20). Confession of sins is under conviction of the Spirit (John 16:8). Confession of faith is confession by the Spirit (1 Cor. 12:3). Holy Scripture, given by the Spirit, is illumined by the Spirit (2 Cor. 3:6–8). Preaching is a demonstration of the Spirit and of power (1 Cor. 2:4). The fellowship of the Lord’s Table is a fellowship of the Spirit (cf. Acts 2). Liberality flows from the love that is a fruit of the Spirit (Gal. 5:22). Living life in a context of prayer and praise and proclamation is walking in the Spirit (cf. Rom. 8:1–17). It is a question not of spiritual worship as distinct from liturgical worship, but rather of the inner ministry of the Spirit in regenerating and sanctifying power. The person who is born of the Spirit and led by the Spirit is one who even in outward expression offers to God through Christ fitting and acceptable worship.