Romans 3:25, "Whom Yahweh set forth as a sacrifice of atonement by His own blood, through the faith, to declare His righteousness for the remission of sins that are past, through the forbearance of Yahweh;
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Romans 3:25-26, means what it says, any who have faith in the true Messiah have been justified by being reconciled to Yahweh by having ALL their past sins forgiven. Please see above post also.
You are having trouble seeing the truth in this because you think we are living under a covenant of law, instead of a covenant of grace. You really don't know what grace is. You think it is a life renewed to follow laws instead of being
a new life that isn't under the dominion of laws. The fact that the latter part of this statement unsettles you is proof that you really don't know the life. It may be in you, but you really don't know it. You are adrift.
Grace is the forbearance of GOD that withholds judgment justly due sinful beings. He can do this because 1) he wants to (because he delights in mercy), and 2) he can (because he can be just while justifying those who believe in Christ's sacrifice).
At the cross, GOD forgave the sins of Israel committed under the old covenant and passed over the consequences of those sins, i.e. judgment. Paul was speaking from a vantage point beyond the cross, and referred to those sins before the cross as past. The cross began a new era; not of law and death, but of grace and life.
But actually there's more to it than that. This is a literal translation of Romans 3:25:
[Christ,] whom GOD purposed a propitiatory shelter through faith in his blood into showing his justice through the passing over of the penalties of sin having previously occurred [under the old covenant]. Romans 3:25
The Greek word translated
sins in Romans 3:25 is ἁμάρτημα (harmatema); the -ma suffix means effect (i.e., sin effect, or consequence of sin).
ἁμάρτημα (harmatema) is not the normal word used for sin, and is rarely used in the NT (5x). It is used quite a few times in the LXX.
Sin effect is the only meaning that makes sense where is it used in verses like Isaiah 20:2 and Deuteronomy 19:15.
The
passing over of the consequences of sin in Romans 3:25 is a direct reference, IMO, to the Passover in which the death angel passed over the execution of the consequences of sin (death) in Israelite households covered with lamb's blood. Christ is our Passover. We are justly due judgment for our sins, but GOD in his mercy and justice passes over that judgment (sin effect).
2 Peter 1:9 is similar to Romans 3:25:
But he that lacketh these things is blind, and cannot see afar off, and hath forgotten that he was purged from his old sins. 2 Peter 1:9
Like Romans 3:25, the word translated sins is ἁμάρτημα (hamartema), i.e. sin effect, or consequences of sin.
Well, not exactly exactly because someone messed with this verse in some ancient manuscript(s). Codex Vaticanus has the normal word for sin (αμαρτια, hamartia), whereas Codices Sinaiticus and Alexandrinus have ἁμάρτημα (hamartema). Many bibles have αμαρτια (hamartia) because they were translated from Codex Vaticanus.
This is my interpretation based on my belief that ἁμάρτημα (hamartema), i.e. sin effect, is the original word:
Yet to whom these things are not present is blind, closing his eyes, oblivious to receiving cleansing of the former consequences of his sins. 2 Peter 1:9
This agrees with Paul in Romans 3:25. Both Peter and Paul were speaking from a perspective of having lived under the old covenant, and were thus speaking about GOD's passing over of the former consequences of sins committed under that covenant.