What if the “I will remember no more” here, in Heb. 8:12, is exactly like the promise, “his righteousness which he hath done shall not be remembered him”, in Ezek. 3:20 & Ezek. 18:24? I say again, what if God operates in “memory-omitting” powers for regenerate and unregenerate men, in account of sin and righteousness committed (with continuance without repentance), just as it is written (see Ezek. 18:21-24 [specifically verses 22 & 24], and see Ezek. 3:20, Heb. 8:12, 10:17)? God is able to forget sins and then remember them again, truly! And God is able to forget righteousness and remember it again, likewise!
Should not this “memory-omitting” power be held in balance with the promise, “their sins and iniquities will I remember no more” (Heb. 10:17), especially because there is a subsequent warning given; namely, the remembrance of sins which were formerly forgotten (of blood-bought saints [Heb. 10:19] who were thereby, “sanctified” through blood-sprinkling, then becoming disqualified from atoning mercies which were provided by the “sacrifice” of Christ (Heb. 10:26-29 [compare Heb. 10:26-28 with Numbers 15:28-31, compare Heb. 10:29 with Num. 15:31 & Ezek. 3:20]). You see, my reader, men perished and will perish in the Old Covenant and New Covenant alike because, God executed justice in “memory-omitting”, atonement-mercy disqualifying, and promise-breaching powers! The Condescension of God makes possible such repentances; the Lord going back on what He thought and said (see Jer. 18:7-11 or Ezek. 33:12-20 as a brief example).
Or, on the contrary, do you believe that God remembers your righteousness no more?