Romans 10:10 English Standard Version (ESV) For with the heart one believes and is justified, and with the mouth one confesses and is saved.
Justification and salvation are not the same thing. To clarify that statement we must look to biblical definitions and not what the world has to say about them.
Luke 16:15 English Standard Version (ESV) And he said to them, “You are those who justify yourselves before men, but God knows your hearts. For what is exalted among men is an abomination in the sight of God.
Men make excuses for themselves to escape the justice of mankind. There is no escaping the justice of God because He knows what lies in the hearts of all His creation.
Romans 3:25-27 English Standard Version (ESV)
25 whom God put forward as a propitiation by his blood, to be received by faith. This was to show God’s righteousness, because in his divine forbearance he had passed over former sins. 26 It was to show his righteousness at the present time, so that he might be just and the justifier of the one who has faith in Jesus. 27 Then what becomes of our boasting? It is excluded. By what kind of law? By a law of works? No, but by the law of faith.
It is God who justifies, it is justice, it is a legal distinction ruled in the courts of heaven. It is a ruling by that court of not guilty by the blood of the lamb. The law of faith takes precedence.
2 Corinthians 4:16 English Standard Version (ESV) So we do not lose heart. Though our outer self[a] is wasting away, our inner self is being renewed day by day.
Salvation is an ongoing process that is renewed every day.
1 John 1:9 English Standard Version (ESV) If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.
We sin, we confess, He forgives and this goes on our whole lives. Salvation is not a one and done issue.