I’m coming into this post not too sure what the point is here. But I think I get it. If I’m off the mark MT, I’m sure you will let me know.
The earnest of our inheritance is not so much that we must complete the work as you think. He gave us a down-payment called the Holy Spirit, and will finish the work at His coming. But in doing so, God is always the giver and not the recipient. In the salvation process we are always the recipient. This concept can be found in Romans chapter 8 where Paul offered a kind of chain of salvation in a process.
v29 "for whom He foreknew, he also predestinated to be conformed to the image of His Son, that He might be the firstborn among many brethren. v30 Moreover whom He predestined, these he also called, whom he called, these he also JUSTIFIED, and whom he justified, these He also glorified. Ro. 8:29-30
Those He foreknew, he predestined. And those He predestined, He called, and whom those He called is justified, and whom He justified, He glorified.
glorified. … in that order. but if you notice, Paul left out a work that requires a contribution from us. It is the work of sanctification. … When we read, " if we endure … we will be saved… " endurance is a work of sanctification and certainly cannot be understood as a justifying work.
Rom. 2 tells us that in "well doing seek for glory and honor and immortality… " these attributes are all works of sanctification. even though the context is arguing from the Law.
In Galatians Paul offered the sowing and reaping concept all leading to eternal life. Yet sowing and reaping are all part of a sanctifying work of God. There is no hint of salvation as a gift to be received freely.
The passages you quoted here are all out of their context.