explain which "commandments" one must keep to not forfeit ones salvation.
No, I don't buy that salvation is a lifelong process because then nobody truly knows of they are saved or not if that is true one has to "keep" commandment after commandment wondering if they ever keep enough "commandments" to be saved or not.
All of them - all sin is sin.
"
sin IS transgression of the LAW" - 1 John 3:4.
if your question is "Which sin may I cherish and not repent of -- and still have heaven" you are reading "another gospel"
1 John 3 will not allow such a "gospel"
5 And you know that He was manifested to take away our sins, and in Him there is no sin. 6
Whoever abides in Him does not sin. Whoever sins has neither seen Him nor known Him.
7 Little children, let no one deceive you. He who practices righteousness is righteous, just as He is righteous. 8
He who sins is of the devil, for the devil has sinned from the beginning. For this purpose the Son of God was manifested, that He might destroy the works of the devil. 9
Whoever has been born of God does not sin, for His seed remains in him; and he cannot sin, because he has been born of God.
10 In this the children of God and the children of the devil are manifest:
Whoever does not practice righteousness is not of God, nor
is he who does not love his brother.
1 Cor 6
7 Now therefore, it is already an utter failure for you that you go to law against one another. Why do you not rather accept wrong? Why do you not rather
let yourselves be cheated? 8 No, you yourselves do wrong and cheat, and
you do these things
to your brethren! 9
Do you not know that the unrighteous will not inherit the kingdom of God?
Do not be deceived. Neither fornicators, nor idolaters, nor adulterers, nor homosexuals, nor sodomites, 10 nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners will inherit the kingdom of God
If your question is "what part of God's Word may I be uninformed about and still go to heaven" that is another question. "Whatever is not of faith is sin" - and "
to him that knows to do right and does it not - to him it is sin" James 4:17
Rom 6
What shall we say then?
Shall we continue in sin that grace may abound? 2 Certainly not!
How shall we who died to sin live any longer in it? 3 Or do you not know that as many of us as were baptized into Christ Jesus were baptized into His death? 4 Therefore we were buried with Him through baptism into death, that just as Christ was raised from the dead by the glory of the Father, even so we also should walk in newness of life.
5 For if we have been united together in the likeness of His death, certainly we also shall be
in the likeness of
His resurrection, 6 knowing this, that
our old man was crucified with Him, that the body of sin might be done away with, that we should
no longer be slaves of sin. 7 For he who has died has been freed from sin. ...
12
Therefore do not let sin reign in your mortal body, that you should obey it in its lusts. 13 And do not present your members
as instruments of unrighteousness to sin, but present yourselves to God as being alive from the dead, and your members
as instruments of righteousness to God. 14
For sin shall not have dominion over you, for you are not under law but under grace.
15 What then?
Shall we sin because we are not under law but under grace? Certainly not! 16 Do you not know that to whom you present yourselves slaves to obey, you are that one’s slaves whom you obey,
whether of sin leading to death, or of obedience
leading to righteousness? 17 But God be thanked that
though you were slaves of sin, yet you obeyed from the heart that form of doctrine to which you were delivered. 18
And having been set free from sin, you became slaves of righteousness. 19 I speak in human
terms because of the weakness of your flesh. For just as you presented your members
as slaves of uncleanness, and of lawlessness
leading to
more lawlessness, so now present your members
as slaves
of righteousness for holiness.
20 For
when you were slaves of sin, you were free in regard to righteousness. 21 What fruit did you have then in the things of which you are now ashamed? For the end of those things
is death. 22
But now having been set free from sin, and having become slaves of God, you have your fruit to holiness, and the end, everlasting life. 23 For the wages of sin
is death, but the gift of God
is eternal life in Christ Jesus our Lord.