When Peter made the declaration that Jesus is “the Christ, the Son of the living God,” Jesus said, “on this rock I will build my church, and the gates of hell shall not prevail against it” (Matthew 16:18).Jesus has, indeed, built his church upon this confession of his being the Christ. But, what is the church? In Scripture Jesus speaks of those “that the Father gives me” (John 6:37). Those who belong to Christ are the church. They are sometimes called the elect, the bride of Christ, the company of the redeemed, the communion of saints, and the new Israel.
Saint Augustine referred to the church on earth as “a mixed body.” Jesus himself said there would be weeds or tares among the wheat (Matthew 13:24-30 and 36-43). Not everyone that we see in the church on earth is a believer. For that reason, people often speak of the visible and invisible church.
The invisible church, according to the Westminster Confession “consists of all the elect who have been, are, or shall be gathered into one, under Christ its head” (WCF 25.1). This is everyone who belongs to Christ, from the beginning of time, until the present, and into the future. To us, this is invisible, because we cannot see those who have gone before us, nor those who will come after us. The visible church, on the other hand, is the church on earth at any given moment. It consists of both believers and unbelievers who are either curious or deceptive. Because of this distinction, we can only speak of the invisible church as being holy. Certain manifestations of the visible church may be more or less pure and holy, depending upon the number of unbelievers mixed in.
In Scripture, the church is often compared to a building. To the Ephesians Paul writes that they are being built into a dwelling place for God (Ephesians 2:19-22). Peter uses the same metaphor in his first letter (1 Peter 2:4-5). But the most used comparison is the comparison to the human body (1 Corinthians 12:12-31; Ephesians 3:6; 4:4; Colossians 1:18), for the church is a living organism. And, the head of this body is Jesus Christ (Ephesians 5:23; Colossians 1:18; 2:19). Many would have us believe that a man living on earth can be the head of the church, but Scripture tells us that that honor and office belong only to Christ.
We have already admitted that the manifestations of the visible church on earth may be more or less pure and true at any given time. So, how does one determine if a part of the body is a true church? How does one determine where to worship God? Historically the marks of a true church have been defined as: (1) the true preaching of God’s Word, (2) the use of the sacraments in accordance with their institution, and (3) the practice of church discipline.
If one of the signs of a true church is the proper use of the sacraments, what are the sacraments? The Latin word sacramentum means “mystery.” The Confession states: “Sacraments are holy signs and seals of the covenant of grace. They were directly instituted by God to represent Christ and his benefits and to confirm our relationship to him” (WCF 27.1). The sacraments are visible signs of Christ, means of grace which convey the promises of God to the church.
According to the Roman Catholic church, there are seven sacraments, including baptism, confirmation, holy communion, penance, matrimony, holy orders, and extreme unction. After the Reformation, the protestant church recognizes only two sacraments – baptism and the Lord’s Supper. The sacraments are nonverbal and must never stand alone, without reference to the word of God. The sacraments do not bring about salvation, but they are an important part of worship and the communion between God and his people.
In the old administration of the covenant between God and his people, the sign and seal of the covenant was circumcision (Genesis 17:1-14). It sealed the covenant with a blood seal, and it was a sign of the unseen cutting away of the dead flesh of the sinful heart of natural man (Deuteronomy 10:16; 30:6; Jeremiah 4:4; Romans 2:25-29). In the new administration of the covenant, that sign and seal have changed, to be more inclusive (Colossians 2:11-12). Baptism is now the sign and seal of the covenant.
There are a number of things which are signified by baptism. It speaks of our cleansing (1 John 1:7), regeneration by the Holy Spirit (Titus 3:5), being buried and raised with Christ (Romans 6:4), and being indwelt by the Holy Spirit (Acts 2:1-4; Romans 8:9; 1 Corinthians 3:16). Jesus sent his followers into the world to baptize (Matthew 28:18-20), and that baptism, to be valid, must be in the triune name of God – Father, Son, and Holy Spirit.
A constant debate has raged within the church concerning who should be baptized and how baptism should be administered. Basically, the debate stems from what the two parties see as the meaning of baptism. For some, baptism is an obedient response to the saving power of Jesus Christ. Known as credobaptists, they believe that baptism is a response by those who believe. For most of them, immersion is the preferred mode of baptism, because it signifies death, burial, and resurrection in Christ. Favorite Scripture passages for this group include Mark 16:16; Acts 2:38; and Romans 6:4.
For others, baptism is the New Testament sign and seal of the covenant between God and his people. It signifies the pouring out of the Holy Spirit upon those whom God has called to himself. For that reason, they feel that sprinkling and pouring are the appropriate modes, and they believe that baptism is legitimately administered to the infant children of believers. They are known as paedobaptists. Favorite Scripture passages for this group include Acts 2:39 and the stories of the Philippian jailer and Lydia, whose households were baptized with them upon their profession of faith.
In the old administration of the covenant, Passover was the covenant meal. In the new administration, that meal was changed, when, on the night before he was crucified, Jesus instituted the sacrament of the Lord’s Supper. In recounting that last Passover of Jesus, Paul write, “For I received from the Lord what I also delivered to you, that the Lord Jesus on the night when he was betrayed took bread, and when he had given thanks, he broke it, and said, ‘This is my body which is for you. Do this in remembrance of me.’ In the same way also he took the cup, after supper, saying, ‘This cup is the new covenant in my blood. Do this, as often as you drink it, in remembrance of me.’ For as often as you eat this bread and drink the cup, you proclaim the Lord’s death until he comes” (1 Corinthians 11:23-26).
A major controversy has raged within the church concerning the elements of the Lord’s Supper and how they are the body and blood of Christ. The Roman Catholic church accepts the doctrine of transubstantiation, which teaches that, as the priest prays over the elements, they actually change in substance and become the body and blood of Jesus Christ. The Lutherans accept the doctrine of consubstantiation which teaches that Christ is present in the elements, but that their substance does not actually change. A third group, followers of Zwingli and Calvin, including Presbyterians, see the elements as representing the body and blood of Christ. For them, Christ is in the elements in a spiritual sense, and believers feed upon him in spiritually.
Essential #6:
God has called a people out of the world and unto himself. The people of God are the church. The church which we see on earth contains both believers and unbelievers. Christ is building his church, and the gates of hell will not prevail against it. The signs of a true church are the faithful preaching of the word, the right administration of he sacraments, and the practice of church discipline. The sacraments (baptism and the Lord’s Supper) are signs and seals of the covenant which represent Christ and his benefits to us as believers.