It isn’t possible for Jesus to separate himself from God
I’m not sure how that works in your conception, given Php 2:6-7, Mt 27:46, and, well, the whole ideas of the Incarnation and the Trinity: while (from an orthodox perspective) Jesus is God, Jesus is also *separately *himself.
To this, I say, “AMEN.” No mention of paying a penalty though.
I’m sorry, but I am a bit perplexed by how this works for you, too. Heb 9:15 refers to Christ’s redemption of us, i.e. the payment of our penalty, Is 53:5 to Christ’s paying our penalty, Rom 3:23+6:23 to the penalty being ours to pay but of his having taken it, 1 Tim 2:5-6 to Christ’s paying the “ransom” (i.e. penalty) for us, 1 Pe 2:24 to Christ’s having suffered for our sins to free us (i.e. paying our penalty), and 1 Jn 4:10 to Christ’s having expiated our sins (i.e. having removed the penalty - see also Numbers 5:8). You refer later to “a penalty equal to a sentence that we would be required to serve if we were not given the grace of Christ’s redemptive death”, but that idea
is explicitly stated in the Hebrews, Isaiah, Romans, and 1 Peter passages. There is another discussion of it in this section:
Heb 9:22 And
almost all things are by the law purged with blood; and without shedding of blood is no remission.
Heb 9:23 It was therefore necessary that the patterns of things in the heavens should be purified with these; but the heavenly things themselves with better sacrifices than these.
Heb 9:24 For Christ is not entered into the holy places made with hands, which are the figures of the true; but into heaven itself, now to appear in the presence of God for us:
Heb 9:25 Nor yet that he should offer himself often, as the high priest entereth into the holy place every year with blood of others;
Heb 9:26 For then must he often have suffered since the foundation of the world: but now once in the end of the world hath he appeared to put away sin by the sacrifice of himself.
Heb 9:27 And as it is appointed unto men once to die, but after this the judgment:
Heb 9:28 So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.
In a comment to someone else, you say, “What I find problematic is the concept that Jesus bore the burden of all the penalties due to my sins (and everyone else’s) as if there was a legal transaction taking place.” Are you talking about Christ’s remission of our sin, mentioned in the passages above, or are you talking about an instantaneous, singular remission of all sins which exonerates a Christian of everything which s/he might
ever subsequently do, i.e. the “Once Saved, Always Saved” doctrine? If you mean the latter, then no, it is not in Scripture, for very good reason.