5 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, the things of the Spirit
6 For to be carnally minded is death, but to be spiritually minded is life and peace.
flesh, carnal — the old nature
mind = habit of thought, total interest — not understanding. It’s the same word translated “set affections on” in Colossians 3:1-3.
peace — not reconciliation but the enjoyment of it
Christians can be dead as far as experiencing the fruit of the Spirit — dead experientially
Wherefore he saith, Awake thou that sleepest, and arise from the dead, and Christ shall give thee light (Ephesians 5:14).
For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting (Galatians 6:8).
The death spoken of in Romans eight must be understood as the loss of a life that is dedicated to God and blessed in Him on earth. There are many Christians who have physical life, and who go about their tasks, even religious tasks, but who are not rejoicing in the great triumphant realities that are available for us, but which remain unclaimed and unused. Life, in this passage, is nothing less than the abounding triumph of the believer in the joy of the fullness of the Holy Spirit. Anything less than this, when it is possible, is death. Death, then, in this passage, is the living existence of a born-again believer on a spiritual level that is lower than that which God has designed for us. When this is understood the passage returns to its place in a logical sequence and becomes a powerful exhortation to high and holy Christian living. — Barnhouse, page 30-31.