I am not sure which version you use, but Titus 3:3 is very different in the KJV.
Titus 3:3 For we ourselves also were sometimes foolish, disobedient, deceived, serving divers lusts and pleasures, living in malice and envy, hateful, and hating one another.
The KJV says "serving" not enslaved. And Paul said we are servants to whom we obey.
I used NASB
The word used is- δουλεύω/ douleuō
1. to be a slave, serve, do service
a. of a nation in subjection to other nations
2. metaph. to obey, submit to
a. in a good sense, to yield obedience
b. in a bad sense, of those who become slaves to some base power, to yield to, give one's self up to
Rom 6:16 Know ye not, that to whom ye yield yourselves servants to obey, his servants ye are to whom ye obey; whether of sin unto death, or of obedience unto righteousness?
You teach the opposite of what Paul says. You say we must sin because we are enslaved to sin. But Paul says the opposite, he says you become a servant to sin when you "yield yourselves" servants to obey. And Paul also says a man can obey or serve righteousness.
We were always a slave to sin before we came to Christ. We never submitted to God by faith whatever the case may have been. We all were once slaves to sin, but now in Christ we are slaves to righteousness, that is if we submit to His righteousness. The point is that we all once gladly yielded to what we loved- sin, darkness, selfishness, independence, and so on.
And Jesus said the same.
John 8:34 Jesus answered them, Verily, verily, I say unto you, Whosoever committeth sin is the servant of sin.
Jesus didn't say you sin because you are a slave to sin, he said you become a servant to sin when you sin.
So, this is a huge difference and contradiction to what you believe and teach. Show me anywhere in the scriptures where it says a man is compelled to sin by his sin nature.
The question again is who didnt continually sin before knowing Christ? Isnt the new commandment faith in Him? If we never kept this commandment then we always disobeyed it and always were sinning. Therefore we were slaves of breaking Gods first command every day until Christ showed up. All men are slaves to sin because all sin... unless they have Jesus
The very purpose of nature is the essense of how a thing reacts. An animal acts like it does because that is its nature, a child acts like he/she does by nature, and so forth.
definition: the particular combination of qualities belonging to a person, animal, thing, or class by birth, origin, or constitution; native or inherent character: human nature.
So our nature is not good and pleasing to God, but rather evil. Our nature isnt a combo or an option, but it is who we are and what we do.