A.T. Robertson Commentary Romans 8:5

"For they that are after the flesh mind the things of the flesh; but they that are after the Spirit the things of the Spirit." — Romans 8:5 (ASV)

Do mind (φρονουσιν). Present active indicative of φρονεω, to think, to put the mind (φρην) on. See Mt 16:23; Romans 12:16. For the contrast between σαρξ and πνευμα, see Ga 5:16-24.