Ephesians 4:22 That you put off the old man (23) And that you be renewed in the spirit of your mind (24) And put on the new man Romans 12:2 And do not be fashioned according to this age, but be transformed by the renewing of the mind
Between the word regarding the putting off of the old man and the putting on of the new man, Paul wedges in the thought of being renewed in the spirit of our mind. To be renewed is for our transformation to the image of Christ (2 Cor. 3:18).
The spirit here is the regenerated spirit of the believers mingled with the indwelling Spirit of God. Such a mingled spirit spreads into our mind, thus becoming the spirit of our mind. It is in such a spirit that we are renewed for our transformation.
In this way our natural mind is conquered, subdued, and put under the spirit . By the spirit of the mind we are renewed to fulfill in experience what was accomplished in the putting off of the old man and the putting on of the new man. The putting off of the old man and the putting on of the new man are accomplished facts.
Now we must experience and realize these facts by being renewed in the spirit of our mind. As these facts are realized in experience, we live a life that corresponds to the life of Jesus. When we are renewed in the spirit of our mind to execute the fact of having put off the old man and having put on the new man, we live a life according to the truth that is in Jesus.
[For example, in our natural thinking we may prefer one type of people over another, but as our mind is renewed by the indwelling Spirit, we are transformed to enjoy fellowshipping with all kinds of people.]