More relevant passages…
James 4
17 Anyone, then, who knows the right thing to do and fails to do it, commits sin.
1 John 5
16 If anyone sees his brother committing a sin not leading to death, he shall ask, and God[a] will give him life—to those who commit sins that do not lead to death. There is sin that leads to death; I do not say that one should pray for that. 17 All wrongdoing is sin, but there is sin that does not lead to death.
18 We know that everyone who has been born of God does not keep on sinning, but he who was born of God protects him, and the evil one does not touch him.
Firstly, other than the commandments and a few other sins mentioned in the New Testament is it possible for a Protestant to commit a mortal sin as you need full knowledge to commit them and therefore surely they cannot?
Of Course
Secondly, when a Protestant is in mortal sin how do they get out of it without confession, is it possible for them just to repent and ask God for his forgiveness with a contrite heart?
I`ll let God be God and judge that. But I believe Dronalds passage about the servants and masters deserving beatings has some relevance. This also is a strong reference to Purgatory.
Another interesting story…
Acts 8
9 But there was a man named Simon who had previously practiced magic in the city… 12 But when they believed Philip as he preached good news about the kingdom of God and the name of Jesus Christ, they were baptized, both men and women. 13
Even Simon himself believed, and after being baptized he continued with Philip. And seeing signs and great miracles performed, he was amazed.
14 Now when the apostles at Jerusalem heard that Samar′ia had received the word of God, they sent to them Peter and John, 15 who came down and prayed for them that they might receive the Holy Spirit; 16 for it had not yet fallen on any of them, but they had only been baptized in the name of the Lord Jesus. 17 Then they laid their hands on them and they received the Holy Spirit. 18 Now when Simon saw that the Spirit was given through the laying on of the apostles’ hands, he offered them money, 19 saying, “Give me also this power, that any one on whom I lay my hands may receive the Holy Spirit.” 20 But Peter said to him, “Your silver perish with you, because you thought you could obtain the gift of God with money![a] 21 You have neither part nor lot in this matter, for your heart is not right before God. 22
Repent therefore of this wickedness of yours, and pray to the Lord that, if possible, the intent of your heart may be forgiven you. 23 For I see that you are in the gall of bitterness and in the bond of iniquity.” 24 And Simon answered, “
Pray for me to the Lord, that nothing of what you have said may come upon me.”
This story has a believer who is Baptized and continues with the Apostle, then reveals he is not converting his heart and has mortal sin. Peter rebukes him strongly and charges him to pray to God for forgiveness. He then, humbly asked for Peter`s petition as well.
NOTE… In Sacramental Confession, we pray to God and we confess before His Church.