A Christian is a person professing belief in Jesus Christ and on the teachings of Jesus.
Many people who do not believe and trust in Jesus consider themselves Christians simply because they go to church or they live in a “Christian” nation. But going to church, serving those less fortunate than you, or being a good person does not make you a Christian. Going to church does not make you a Christian. Being a member of a church, attending services regularly, and giving to the work of the church does not make you a Christian.
Good works we do cannot make us acceptable to God. Titus 3:5 He saved us, not because of righteous things we had done, but because of his mercy. He saved us through the washing of rebirth and renewal by the Holy Spirit. A Christian is someone who has been born again by God. John 3:3, John 3:7, 1 Peter 1:23
A true Christian is a person who has put faith and trust in the person and work of Jesus Christ, including His death on the cross as payment for sins and His resurrection on the third day. John 1:12 The mark of a true Christian is obedience to God’s Word and love for others. 1 John 2:4,10
Other Scriptures explain how a person comes to faith in Jesus Christ, though being dead in our sins, we are saved by grace. Ephesians 2:8-9 A true Christian has faith in Jesus as the Savior. Romans 10:9-10
A true Christian lives by faith in the death and resurrection of Christ. 1 Cor 15:3-4
A true Christian has God’s Holy Spirit living within. Romans 8:9,16
The evidence of a true Christian is displayed in both faith and action. 2 Cor 5:17
A true Christian will show his faith by how he lives. James 2:18
Despite the wide variety of beliefs that fall under the general “Christian” label today, the Bible defines a true Christian as one who has personally received Jesus Christ as Savior, who trusts in the death and resurrection of Jesus Christ alone for forgiveness of sins, who has the Holy Spirit residing within, and whose life evinces change consistent with faith in Jesus.