Spinoff: Law vs. Grace?

[Dale (evolutionary providentialist)]

@Edgar

If a believer willfully commits serious sin, he risks losing his justification by works - this is what Paul warns believers about in Gal 5 and 1Cor 6.

 
Is this what you were referring to in Galatians 5?:

I warn you, as I warned you before, that those who do such things will not inherit the kingdom of God.

That does not say anything about losing it. That speaks about never getting it.
 

ETA: Likewise 1 Corinthians 6:

Or do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived: neither the sexually immoral, nor idolaters, nor adulterers, nor men who practice homosexuality, nor thieves, nor the greedy, nor drunkards, nor revilers, nor swindlers will inherit the kingdom of God.

That is not a warning about losing it. It is about never getting it. Again, the warnings are for people who live that way, including those in the church who may think they are believers, but indeed are not. And yet again, one more time, they are also standards for believers who are already adopted and heirs to test themselves against, for assurance.