One of the many errors of the modern day once saved always saved theology is the belief that the saving grace of God is a free gift with no obligation to live for Jesus.
This version of “the free gift of grace” is accompanied with the belief that the personal righteousness of Jesus is imputed at the time of a “one time believing experience” and all who receive this imputed righteousness have it regardless of what kind of life they live.
In this theology, it is possible for one who has been “once saved” to live as an adulterer, a child molester, a sex trafficker, an axe murderer, a blasphemer, a drunkard, a drug war Lord, etc.., and still have eternal life because the gift of saving grace and the imputed righteousness of Christ is irrevocable.
Consider what has just been said. In this theology, an adulterer, a child molester, a sex trafficker, an axe murderer, a blasphemer, a drunkard, and a drug war Lord, are exempt from condemnation for their sins because they have Christ’s righteousness imputed to them while they are doing such things.
In contrast to such perverse theology consider 1 John 3:7-10
7 Little children, let no man deceive you: he that DOETH RIGHTEOUSNESS is righteous, even as he is righteous.
8 He that committeth (habitually practices) sin IS OF THE DEVIL; for the devil sinneth from the beginning. For this purpose the Son of God was manifested, that he might DESTROY THE WORKS OF THE DEVIL.
9 Whosoever is born of God DOETH NOT commit (habitually practice) sin; for his seed remaineth in him: and HE CANNOT (habitually practice) sin, because he is born of God.
10 In this the children of God are MANIFEST, and the children of the devil: WHOSOEVER DOETH NOT RIGHTEOUSNESS IS NOT OF GOD, neither he that loveth not his brother. (1 John 3:7-10)
Those who teach imputed righteousness apart from faithfulness to Jesus teach serious and egregious error. There is no freeloading on the righteousness of Jesus Christ for those who love their sin and refuse to give it up.