Then we have no volition, His commands and warnings are all fluff. and all conditional clauses - if...then - relevant to the topic are meaningless.
Phil2:12-13 for example says otherwise and you misunderstand Grace.
You say living by volition and being assisted are incongruent, then you reference Scripture that describes living by volition and being assisted.
And this just before Paul calls them fools/stupid for having begun [in/by] Spirit and wanting to walk away and be perfected/completed [in/by] flesh.
So, the metaphorical yoke Jesus told
men to put on and learn from Him - which is language of discipleship and following a Rabbi - is now something we're stuck in and can't remove or walk away from. Yet we have record of disciples doing just that. And the command to not be yoked together with unbelievers means to not put a piece of wood around our mutual necks that we can't remove.
The bought with a price and not your own is in the context of a command to flee/avoid sin. It's giving us spiritual reasoning of what's been done for us to assist us in considering how we live. This is more volition being trained under Grace, because of the value God places on volition.
I've mentioned Phil2:12-13. IMO it's one of the best pieces of Scripture to help us understand our cooperative union with God. Paul praises obedience, commands more obedience, states the believer's proper Fear of God, and explains what God is doing in the Christian to assist and build his will and work.
I have no interest in discussing any concept related to Calvinistic concepts of corpses that have no volition. It's just absurdity.
Re: your amusement park ride, good for you. Once again commands, and conditional clauses in His Word. are meaningless. Let's look at the way you build on this life is an amusement park concept:
“It would seem that Our Lord finds our desires not too strong, but too weak.
We are half-hearted creatures, fooling about with drink and sex and ambition when infinite joy is offered us,
like an ignorant child who wants to go on making mud pies in a slum because he cannot imagine what is meant by the offer of a holiday at the sea. We are far too easily pleased.”
― C.S. Lewis,
The Weight of Glory, and Other Addresses
As you do with Scripture, you also do with Lewis and misunderstand or create your own context.
Rom8:29 is speaking of God's predetermined plan. It has in context a few of those conditional clauses explained away by concepts you espouse:
NKJ Rom8:16-17 The Spirit Himself bears witness with our spirit that we are children of God, 17 and if children, then heirs-- heirs of God and joint heirs with Christ,
if indeed we suffer with Him, that we may also be glorified together.
NKJ Rom8:25 But
if we hope for what we do not see, we eagerly wait for it with
perseverance endurance.
Note the endurance. This is long term abiding and enduring as commanded. And joint-heirship with Christ assuming we suffer with Him.
You can go back in context and read the differences between the walk in Spirit and walk in flesh. Make sure you look at Rom8:13 and pay attention to the "IF" clause there in regard to life or death.
I understand being under Grace vs. being under Law. I don't think you do.