Justification.

Romans_5-1: Therefore being justified by faith, we have peace with God through our Lord Jesus Christ:

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Romans 5:1
Therefore being justified by faith, we have peace with God through our Lord Jesus Christ:

What Is Justification?
Justification is God’s act of removing the guilt and penalty of sin while at the same time declaring a sinner righteous through Christ’s atoning sacrifice.

What Gives Us The Assurance That We Are Saved? We Are Born Again Christians?

Romans 10:9-13
9 For if you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved. 10 For it is by believing in your heart that you are made right with God, and it is by confessing with your mouth that you are saved. 11 As the Scriptures tell us, “Anyone who believes in him will not be disappointed.”