Theology of Public Worship
Worship must be carried out according to God’s revealed will. We want to worship God in the way that He has prescribed as best as we possibly can.[1] So, we want our worship to be drenched in Bible. We want every aspect to pour out biblical truth.
Public worship must succeed as much as possible in carrying out what God has given us in His word to do. We should acknowledge, however, that “The New Testament does not provide us with officially sanctioned public ‘services’ so much as with examples of crucial elements.”[2] Even though it is true that the New Testament does not give us “a complete manual of liturgics,”[3] it does gives us clear things that we are to do.[4]
The Great Commission in Matthew 28 tells us a few things that are essential for disciples of Jesus. Matthew 28:19-20 says: “Go therefore and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit, teaching them to observe all that I have commanded you.” We will look at implications from the Great Commission first and then turn to other crucial aspects of what it means to be the called out ones of God.
First, the church is given a command. Something we must collectively work at carrying out. We must make disciples and that includes sharing the good news of Jesus with others (Matt. 28:19-20; Acts 1:8). Public worship then is to facilitate discipleship (which includes encouraging evangelism).
4 Reasons Sermons are Essential
Why are sermons such a big deal? The Bible tells us to sing as the gathered church. The Bible also tells us to celebrate the Lord’s Supper and baptisms. But why are sermons essential?
Sermons are essential because they teach God’s truth so as to exalt Christ, encourage and build up, and exhort the gathered church.
First, the teaching aspect of the sermon is important. Its importance is seen all over Scripture (e.g. Neh. 8:7-8; 1 Tim. 3:2). God has spoken and so helping people understand and apply the revelation from Him is life-changing. God’s people, however, are able to understand His truth. This is because all believers are indwelt by the Holy Spirit (Eph. 2:22; 1 Cor. 3:16; 2 Cor. 6:16), Jesus has made all those in Him priests (1 Pet. 2:5, 9; Rev. 1:5-6), and Scripture is clear on the things which are “necessary to be known, believed, and observed, for salvation” (The Westminster Confession of Faith, ch. 1). Qualified teachers are still vital, however, because sound (or healthy) doctrine is vital. That is, in part, why pastors must be “able to teach” (1 Tim. 3:2; 2 Tim. 2:24) and defend the truth (2 Tim. 2:25; Titus 1:9). We also see in Scripture that right teaching leads to maturity and the body of Christ being equipped for every good work. Believers may be able to subsist on milk but teachers are able to provide needed meat (2 Cor. 3:2; Heb. 5:12-13).
Second, communicating God’s truth in sermons is vital because the Bible is the authoritative word of God and it is uniquely profitable (2 Tim. 3:16-17). It is our sole authority for faith and practice. Scripture is a light (Ps. 119:105,130), a sword (Eph. 6:17), a hammer (Jer. 23:29), and a surgeon (Heb. 4:12). Scripture is more essential than bread (Matt. 4:4), better than gold (Ps. 19:10; 119:72), and we need it to live (Ps. 119:144). Scripture is perfect (Ps. 19:7), true (Ps. 19:9), pure (Ps. 19:8), and eternal (1 Pet. 1:25). Scripture contains the words of life (Jn. 6:68) and the words that are breathed out by God (2 Tim. 3:16). Scripture gives joy (Ps. 119:111; Jer. 15:16), makes wise (Ps. 19:7), equips (2 Tim. 3:17), guards (Ps. 119:9), guides (Ps. 73:24; 119:105), saves (1 Pet. 1:23), sanctifies (Ps. 119:9,11; Jn. 17:17), and satisfies because by it we know God (1 Pet. 2:3 cf. Ps. 16:11; Jn. 17:3).
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