I'm going to give you three witnesses from scripture since you say "The Bible assumes".
The bible says out of the mouth of three witnesses let every word be established.
First Peter 1
"14 As obedient children, do not conform to the evil desires you had when you lived in ignorance"
First Peter 4
"4 Therefore, since Christ suffered in his body, arm yourselves also with the same attitude, because whoever suffers in the body is done with sin. 2 As a result, they do not live the rest of their earthly lives for evil human desires, but rather for the will of God"
And this one , Romans 6, this seals the deal.
" What shall we say then? Shall we continue in sin, that grace may abound?
2 God forbid. How shall we, that are dead to sin, live any longer therein?"
I went into a whole discussion on this in a video posted on the YouTube channel J. Talks to the people. For more information in watching, let me know.
Scripture say God forbid and God who is Christ Holy thing Holy God wants his people to be holy as he is and arm themselves the same so that they're done with sin that they continue no longer there in.
Do you believe that?