Romans 5 12Therefore, just as through one man sin entered into the world, and death through sin, and so death spread to all men, because all sinned-- 15 But the gift is not like the trespass. For if the many died by the trespass of the one man, how much more did God’s grace and the gift that came by the grace of the one man, Jesus Christ, overflow to the many! 16 Nor can the gift of God be compared with the result of one man’s sin: The judgment followed one sin and brought condemnation, but the gift followed many trespasses and brought justification. 17 For if, by the trespass of the one man, death reigned through that one man, how much more will those who receive God’s abundant provision of grace and of the gift of righteousness reign in life through the one man, Jesus Christ!...The imputed sin of Adam was a birthday gift to us... The righteousness of Christ imputed to us is our NEW BIRTH GIFT
Who could, after having the revelation of the Holy Spirit, turn away from the gospel, if the righteousness of Christ had been imputed to them?
Hebrews 6:
1] Therefore leaving the principles of the doctrine of Christ, let us go on unto perfection; not laying again the foundation of repentance from dead works, and of faith toward God,
[2] Of the doctrine of baptisms, and of laying on of hands, and of resurrection of the dead, and of eternal judgment.
[3] And this will we do, if God permit.
[4] For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost,
[5] And have tasted the good word of God, and the powers of the world to come,
[6] If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.
[7] For the earth which drinketh in the rain that cometh oft upon it, and bringeth forth herbs meet for them by whom it is dressed, receiveth blessing from God:
[8] But that which beareth thorns and briers is rejected, and is nigh unto cursing; whose end is to be burned.
[9] But, beloved, we are persuaded better things of you, and things that accompany salvation, though we thus speak.
[10] For God is not unrighteous to forget your work and labour of love, which ye have shewed toward his name, in that ye have ministered to the saints, and do minister.
[11] And we desire that every one of you do shew the same diligence to the full assurance of hope unto the end:
The Once-saved-always-saved gang, of course say that Hebrews 6 is not a part of God's word.
If we are his, Yeshua writes his Torah on our hearts, which instruction in righteousness is what is to lead us toward righteousness. There is no "imputing" to be found in the word of God.