Christians believe that they are children of God because

Christians believe that they are children of God because through faith, they were baptized into Christ and put on Christ. Christians believe that Jesus is the Son of God and that by putting their faith in him, they become adopted into God's family. This adoption is made possible through baptism, where they are cleansed of their sins and become new creations in Christ. By being baptized into Christ, Christians believe that they are filled with the Holy Spirit and are given the power to live a new life in obedience to God. This new life is marked by a desire to follow Christ's teachings and to love God and others as themselves. Thus, Christians believe that they are children of God, not because of their own merits or works, but because of God's grace and their faith in Christ.