The most common is the word translated “church.” In Greek it is ekklesia and simply means "called out"; from ek “out” and kalein “to call.” It was regularly used in Jesus’ time of the called out assembly of citizens in a free city (Acts 19:39), and extensively (over 100 times in the NT) by early Christians as a reference to the people of God. It describes how we are called by the gospel (1 Thess. 1:12-13; 2 Thess. 2:12-14); out of darkness into light, from the power of Satan to the kingdom of Jesus (Acts 26:18; Col. 1:12-14). It really is no more complicated than that: God has called us out of the world into fellowship with Himself.
Another frequently used phrase for the people of God is kingdom. Sometimes it is “of Heaven,” others “of God” and in a few cases simply “kingdom,” but in each case it describes the relationship in terms of authority. Christians, as citizens in the Kingdom (Eph. 2:19; Col. 1:13), submit to the authority of Jesus, the King of Kings, (Rev. 19:16).
The people of God are also described as members of the body of Christ. In this figure we are described as hands or feet, ears or eyes, with the specific emphasis of unity (1 Cor. 12:12-27). Regardless of our particular talents we must remember we are part of the whole body working together as a unit (Rom. 12:1-8) directed by the head - Jesus (Eph. 1:22-23).
In 1 Pet. 2:5-7 we are called stones in the house of God. Alive in Christ, who is the living foundation, we are built up into a spiritual dwelling place where God is worshipped (Eph. 2:19-22).
Another fascinating illustration is found in John 15:1-6, where we are branches on the vine. An easily understood picture from farm life, Christ is the vine and the individual christians are the branches. It emphasizes bearing fruit in Jesus (Col. 1:9-10).
We are also described as children who have been adopted into God’s family through our elder brother, sharing in the same family spirit (Rom. 8:14-17; Heb. 2:10-14).
In every figure the commanding person is always Jesus. He is the means of our calling into His church. He is King, the head of His body, the foundation stone for His dwelling place and the life giving vine. We are nothing and nowhere if we are not in Him. Where are you?
James McClenny