Just trying to think of what the witness doctrine would say to this?
WT would say that Jesus paid a debt for Adam.... not you or me. For the average JW, the WT would say that you now get to work for your salvation by doing good and adhering to all the rules of the WT. Pretty much the same as the Catholic Church.
But scripture says that "by the works of the Law shall no flesh be justified". (Justification means - no debt). But what is even worse than that is that scripture also says if you try to work for your salvation, you are actually piling up even more debt that you must pay for on Judgement Day - after you die (Hebrews 9:27)
Rom_4:4 Now to him that worketh is the reward not reckoned of grace, but of debt.
For the joy that was set before him, Jesus paid a debt He didn’t owe because we owed a debt we couldn’t pay.
The moment when Jesus Christ was killed.. shouldn't life entered the world? But if Jesus Christ still exists, what good was the sacrifice? Shouldn't Jesus Christ be destroyed entirely for any sacrifice to take place?
Eph 1:13 In whom ye also trusted, after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed with that holy Spirit of promise,
Eph 1:14 Which is the earnest of our inheritance until the redemption of the purchased possession, unto the praise of his glory.
Believers get a new spirit when they are sealed. That new spirit cannot sin and thus is a down payment on the full redemption which will include the soul and the body.
When Jesus died as a righteous person, he had no debt. Thus he had a "right" to life. Since God is "a God of the living and not the dead", God freely gave him his rightful inheritance of life.
Believers are offered the same inheritance:
Jn. 1: 12 But as many as received him, to them gave he power to become the sons of God