Romans 8:5

For they that are after the flesh - And here is the great distinction between Jews and genuine Christians: the former are after the flesh - are under the power of the carnal, rebellious principle; and consequently mind, προνουσιν, relish, the things of the flesh - the things which appertain merely to the present life; having no relish for spiritual and eternal things.

But they that are after the Spirit - They who are regenerated, who are born of the Spirit, being redeemed from the influence and law of the carnal mind; these relish the things of the Spirit - they are spiritually minded, and pass through things temporal, so as not to lose the things which are eternal. And this, which in these apostolic times distinguished between the carnal Jew and the spiritual believer in Christ, is the grand mark of distinction between the nominal and the real Christian now. The former is earthly minded, and lives for this world; the latter is spiritually minded, and lives for the world to come.

For they that are after the flesh - They that are under the influence of the corrupt and sinful desires of the flesh; Galatians 5:19-21. Those who are unrenewed.

Do mind the things of the flesh - They are supremely devoted to the gratification of their corrupt desires.

But they that are after the Spirit - Who are under its influence; who are led by the Spirit.

The things of the Spirit - Those things which the Spirit produces, or which he effects in the mind, Galatians 5:21-23. This verse is for the purpose of illustration, and is designed to show that the tendency of religion is to produce as entire a devotedness to the service of God as people had before rendered to sin; that is, that they Would be fully engaged in that to which they had devoted themselves. As the Christian therefore, had devoted himself to the service of the Spirit, and had been brought under his influence, it was to be expected that he would make it his great and only object to cherish and cultivate the graces which that Spirit would produce.

8:5 They that are after the flesh - Who remain under the guidance of corrupt nature. Mind the things of the flesh - Have their thoughts and affections fixed on such things as gratify corrupt nature; namely, on things visible and temporal; on things of the earth, on pleasure, (of sense or imagination,) praise, or riches. But they who are after the Spirit - Who are under his guidance. Mind the things of the Spirit - Think of, relish, love things invisible, eternal; the things which the Spirit hath revealed, which he works in us, moves us to, and promises to give us.