Repent &saved by Grace are tied together. Repent is changing from walking in sin to going forward as a new person no longer walking in sin. Sin is defined in scripture as walking forward outside of God’s Law, that is breaking any one of God’s laws. Repent is a continuous way of walking right up to one’s death. No one can earn Salvation by the way they walk, but all are Judged by the way they walk. If the LORD finds them acceptable by the way they walked, He then extends Salvation to them as a gift, Grace. The first command given to us from Yeshua is to live by every word of God, that is a quote He made from Deu. Only the Old Testament existed when Yeshua walked among us on earth. If you can think with logic, that says the complete Bible, Old & New Testaments apply equally today. One Bible, All of the word of God. Mat 5:7-9 is important scripture as it tells one how all will be Judged.
Continued - Judgment is made by works or walk, Rev 20:12-13. We are told no man can earn salvation, Gal 2:16. It is only by Faith in being given salvation, as a gift. By faith we hear, obey & follow Yeshua, we accept Him as our Messiah. Where Paul or the Apostles say something that does not conform with what Yeshua tells us, then you have the wrong understanding. Always follow Yeshua. There are over 30 verses in the New Testament that tell us of the active role of Yeshua as the mediator for the Father in His dealing with man. No one has seen or heard the Father. It was Yeshua that gave the 10 commandments & the Torah to Moses. Jon 14:15 means all that was given to Moses. There are 2 Witnesses or Testimonies used for Judgment. One inside the Arc for the Masses ,the other on the outside of the Arc for the Saints. One to a minimum standard, one to a higher stdrd. Sin is defined in 1Joh 3:4.