The Greek word for church is _ekkleesia_ and comes from _ekkaleoo_, which means _to call out_ or _summon forth_; and members of the church are the ones who have been called of God (2 Tim. 1:9) through the gospel (2 Thess. 2:14) from a life of sin to a life of holy service (Acts 26:16-18). Church-members or Christians are said to be "saved," "elected," "washed," "sanctified," "redeemed," "recreated," "regenerated," "translated," "espoused," "converted," "reconciled," "adopted," "quickened," "resurrected," etc. This gives us an idea of the radical change that must take place before a person can become a true church-member. It will be noticed that the change expressed by these terms is twofold. The one is subjective, and the other objective. The one is a change of heart or character, and the other is a change of state or relationship to God. The heart is changed by the Holy Spirit (John 3:5), through the preached gospel (1 Pet. 1:23), which leads to faith (Rom. 10:17; Acts 15:9) and repentance (Acts 2:38); while the attitude toward God is changed by confession (Rom. 10:9), obedience in baptism (Acts 2:38) and by God's pardon to the sinner (Acts 2:38). The necessity of this twofold change is manifest from Christ's teaching when he says, "Make disciples of all nations, baptizing them" (Matt. 28:19), "Preach the gospel to every creature. He that believeth and is baptized shall be saved" (Mark 16:16), and "Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God" (John 3:5). Also by the teaching of the Apostles when they say, "Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost" (Acts 2:38), "And now why tarriest thou? arise, and be baptized, and wash away thy sins, calling on the name of the Lord" (Acts 22:16), "Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration and the renewing of the Holy Ghost" (Tit. 3: 5), "For ye are all the children of God by faith in Christ Jesus. For as many of you as have been baptized into Christ have put on Christ" (Gal. 3:26, 27), "For by one Spirit we are all baptized into one body...and have been all made to drink into one Spirit" (1 Cor. 12:13), "The like figure whereunto even baptism doth also now save us (not the putting away of the filth of the flesh, but the answer of a good conscience toward God), by the resurrection of Jesus Christ" (1 Pet. 3:21), "Know ye not, that so many of us as were baptized into Jesus Christ were baptized into his death? Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life" (Rom. 6:3, 4).