Ephesians 1:13-14 ....... And you also were included in Christ when you heard the word of truth, the gospel of your salvation. Having believed, (God) you were marked in him with a seal, the promised Holy Spirit, who is a deposit guaranteeing our inheritance (Eternal Life) until the redemption of those who are God's possession—to the praise of his glory.
Romans 8:1-4 ....... Therefore, there is now no condemnation for those who are in Christ Jesus, because through Christ Jesus the law of the Spirit of life set me free from the law of sin and death. For what the law was powerless to do in that it was weakened by the sinful nature, God did by sending his own Son in the likeness of sinful man to be a sin offering. And so he condemned sin in sinful man, in order that the righteous requirements of the law might be fully met in us, who do not live according to the sinful nature but according to the Spirit.
2 Corinthians 5:17-21 ....... Therefore, if anyone is in Christ, he is a new creation; the old has gone, the new has come! All this is from God, who reconciled us to himself through Christ and gave us the ministry of reconciliation: that God was reconciling the world to himself in Christ, not counting men's sins against them. And he has committed to us the message of reconciliation. We are therefore Christ's ambassadors, as though God were making his appeal through us. We implore you on Christ's behalf: Be reconciled to God. God made him who had no sin to be sin for us, so that in him we might become the righteousness of God.