Paul's letters are a catechism (2 Tim 3:16).
en.wikipedia.org
NKJV.
Romans 2:12-16
12For as many as have sinned without law will also perish without law, and as many as have sinned in the law will be judged by the law
13(for not the hearers of the law
are just in the sight of God, but the doers of the law will be justified;
14for when Gentiles, who do not have the law, by nature do the things in the law, these, although not having the law, are a law to themselves,
15who show the work of the law written in their hearts, their conscience also bearing witness, and between themselves
their thoughts accusing or else excusing
them)
16in the day when God will judge the secrets of men by Jesus Christ, according to my gospel.
Romans 14:22-23
22Romans 14 NKJVDo you have faith? Have it to yourself before God. Happy is he who does not condemn himself in what he approves.
23But he who doubts is condemned if he eats, because he does not eat from faith; for whatever is not from faith is
[j]sin.
Paul now, in looking back may wish he did some things better. Paul and John, with Peter who was corrected, and Elijah, who did so well he ascended bodily.
In Paul's words we don't have a law, we have freedom in Christ. Commands like "no foul word should ever cross your lips" are not the same type of commands as Moses' law.
So what I mean is, I am free, I have my own conscience. I don't think Paul and the apostles were infallible. Paul had the struggle of wanting to be away from the world and his body and with the Lord or to stay with us for our benefit.
NKJV
Philippians 1:19-26
19For I know that this will turn out for my deliverance through your prayer and the supply of the Spirit of Jesus Christ,
20according to my earnest expectation and hope that in nothing I shall be ashamed, but with all boldness, as always, so now also Christ will be magnified in my body, whether by life or by death.
21For to me, to live is Christ, and to die is gain.
22But if I live on in the flesh, this will mean fruit from my labor; yet what I shall choose I
[d]cannot tell.
23[e]For I am hard-pressed between the two, having a desire to depart and be with Christ, which is far better.
24Nevertheless to remain in the flesh is more needful for you.
25And being confident of this, I know that I shall remain and continue with you all for your progress and joy of faith,
26that your rejoicing for me may be more abundant in Jesus Christ by my coming to you again.
At this life's end, we are not judged by a set of rules, but see our life again in full, reviewed, with full compassion and empathy, to the effect of each deed, many places in to others' lives. Like a ripple or butterfly effect. The angels and the Lord guide us. It is poignant to the conscience.
I don't know when God will judge us and when we will be glorified.
We have no better account of the Gospel than the NT.