This is really beautiful,a christain is someone who believe the sacrifice of Christ,who have received Christ into his life,2 Corinthians 5:16 Wherefore henceforth know we no man after the flesh: yea, though we have known Christ after the flesh, yet now henceforth know we him no more. 5:17 Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new. 5:18 And all things are of God, who hath reconciled us to himself by Jesus Christ, and hath given to us the ministry of reconciliation;