I suppose "THE LAW" and "application of Law" is the "MOST" mis-understood doctrine in the "WORLD".
A "JUDGE" never issue a "JUDGEMENT" according to his "predilection" but according to what the "LAW" requires.
We call the court of a Judges who "ARBITRALITY" issue opinions based on his "predilection", rather than the "LAW", a "KANGAROO COURT".
We're "ALL" guilty of sin, "UNDER THE LAW", however God said for those who have "FAITH" in Jesus, the law of death for sin would be "FULFILLED" in Jesus's death, so the law of death "WILL NOT" apply to them.
Ro 6:23 For the wages of sin is death;
but the gift of God is eternal life through Jesus Christ our Lord.
Ro 10:4 For Christ is the end of the law for righteousness to every one that believeth.
Ro 6:14 for ye are not under the law, but under grace.
We all sin before being saved, and we continue to sin after being saved,
But God said, "once we're saved, the law of death for sin will "NO LONGER APPLY" to us.
For God to "come back" and charge us with a sin "UNDER THE LAW", after saying it would not apply, would not only "VIOLATE" his Promise, but also the "LAW" in the "FACT" that Jesus has paid all the "LAW" requires.
Jesus, in paying for "ALL OUR SINS" has "satisfied" the requirements of the "LAW",
And if God then charging us with a sin, it would "NEGATE" the death of Jesus in paying for "ALL OUR SINS".
As with "ALL JUDGES", they only "ADMINISTER" the "LAW", and issue "JUDGEMENTS" according to the "LAW",
"GOD DOESN'T JUDGE ANYONE", the "LAW" is the "JUDGE", and the "LAW" decides the penalty,
For "believers", the "Death" the law requires was "fulfilled" by Jesus, this law no longer applies to "believers".
"UnBelievers" will suffer the "Death" the law requires.
And this is how God will Judge the world, "ACCORDING TO LAW"
Joh 3:18 He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God.
A "JUDGE" (God) can not charge a person with a crime, (sin) if there is "NO LAW" to condemn that crime,
Ro 5:13 but sin is not imputed (charged) when there is no law.
"All Have sinned", but Jesus didn't come to condemn the world but that the WHOLE WORLD".. MIGHT BE...Saved, and died for the sins of the "WHOLE WORLD".
The "OFFER" of salvation is made to the whole world, the "JUDGE" isn't willing for any to "perish", but that "BY FAITH" in Jesus, the "LAW" "COULD NOT" condemn them.
Calvinist believe God passes "JUDGEMENT" according to "Predilection" (predestination) rather than the "LAW", but as the "JUDGE", God only "Administer" the law and passes JUDGMENT" as the law "REQUIRES",
This is why God will condemn "in spite" of his "personal predilection" that none should perish.
NO LAW, NO SIN, NO DEATH,
LAW...SIN...DEATH
The "ERROR" of both "Calvin" and the "Anti OSAS" doctrine is easily seen when the law is understood.