Actually Paul said that we are both (two minds), and that we must operate from the spiritual mind through the power (ability) of the holy spirit .
Our "two minds" is called an unrenewed mind. Renewed mind is to who they are in Christ.
To the Church of Ephesus Paul writes the following in regards to their conduct...
First he addresses the unbelievers:
19They have become callous and have given themselves up to sensuality, greedy to practice every kind of impurity.
Then he addresses the believers in light of the Gentiles behavior:
20But that is not the way you learned Christ!—
21assuming that you have heard about him and were taught in him, as the truth is in Jesus,
He stresses that if you really a believer, you were taught the truth in Jesus. What is that?
22to put off your old self,[SUP]
f[/SUP] which belongs to your former manner of life and is corrupt through deceitful desires,
Notice Paul is stressing their old self is the former manner of life and is now corrupt through old desires. We "put it off". How do we put it off?
23and to be renewed in the spirit of your minds,
Being renewed in our minds. What he calls the "spirit" or "attitude". How we see ourselves...
24and to put on the new self, created after the likeness of God in true righteousness and holiness.
After putting off the old. We put on the new man. And this new man is created like God in righteousness and holiness. And anything that says differently to this is a "falsehood":
25Therefore, having put away falsehood, let each one of you speak the truth with his neighbor, for we are members one of another.
Falsehood here is "lies". We put these things away. And we speak truth with his neighbor. This truth is exactly what he has just explained you are not the old neighbor, you are the new! You're a person of love and because you're a person of love, you do loving works. Or do you not believe God is love? Etc, etc.
That is the essence of prophesy. And why Paul said he desired we would all prophesy.
C.