If a person who has fallen into mortal sins, repents of his sin and trusts in God’s grace in Christ, he receives forgiveness and is saved.
Ezek. 34:16: I will seek that which was lost, and bring again that which was driven away, and will bind up that which was broken, and will strengthen that which was sick.
Ezek.33:19: If the wicked turn from his wickedness, and do that which is lawful and right, he shall live thereby.
1 Joh. 1:9: If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.