What Paul tells us our reasonable service is ...In light of "Romans 4"... could you explain "our reasonable sevice"... ?
You used a verse in your OP that I believe binds to go and "sin"... "unbelieve"... no more.
Im still wondering where you are coming from.
In other words... is anything required of our flesh... to be saved? In your opinion...
agrees completely with many dozens of NT verses, re:
crucifying our flesh, dying to sin, obeying God's will, repenting of sin, etc.
Not IMO, but the NT keeps repeating the red ...
... for those with eyes and ears.