But now we are released from the law, having died to that which held us captive, so that we serve in the new way of the Spirit and not in the old way of the written code. (Romans 7:6).
Hallelujah! He has made a way for us to be released from both the eternal convicting aspect of the Law (which does not save but only informs) and the bondage of sin through His Son and His Spirit.
For those who live according to the flesh set their minds on the things of the flesh, but those who live according to the Spirit set their minds on the things of the Spirit. (Romans 8:5).
I notice the active facet of this verse. They have set their minds. Paul means that Christians purposely intend setting our minds on the things of the Spirit. It doesn’t happen by osmosis. In another epistle, Paul said:
Finally, brothers, whatever is true, whatever is honorable, whatever is just, whatever is pure, whatever is lovely, whatever is commendable, if there is any excellence, if there is anything worthy of praise, think about these things. (Philippians 4:8).
The phrase ‘set their minds’ comes from the Greek word phronousin, the meaning from Strong’s is defined,
5426 phronéō (from 5424 /phrḗn, “the midriff or diaphragm; the parts around the heart,” J. Thayer) – properly, regulate (moderate) from within, as inner-perspective (insight) shows itself in corresponding, outward behavior. 5426 (phronéō) essentially equates to personal opinion fleshing itself out in action (see J. Thayer). This idea is difficult to translate into English because it combines the visceral and cognitive aspects of thinking.
Again, I mention the intention. We have to purposely set our minds to know, then act. Christianity is a thinking religion. We are constantly transforming our mind into the mind of Christ, day by day, step by step, inch by inch…
To live by the Spirit we set our minds on the things of the Spirit.
John MacArthur on Romans 8:5, The Transforming Work of the Spirit, part 1
There is as clear a definition of the distinction between a believer and a non-believer as you will find anywhere. Believers set their minds on the things of the Spirit. Non-believers set their minds on the things of the flesh. That couldn’t be more clear. Again, I remind you that this is a matter of behavior. Listen carefully. Behavior based on the word “walk” in verse 4, but behavior is a product of what? The mind. Thinking.
What are the things of the Spirit that we set our minds on? From the same sermon,
These people are in the realm of the Spirit and are drawn by the truest impulses in their heart to the Spirit. They submit to His direction. They concentrate their attention, purpose, desire on whatever is precious to the Holy Spirit. They love what He loves. They… That’s what it means when it says, They…they seek the things of the Spirit.”
Think on these things…