This I say then, Walk in the Spirit, and ye shall not fulfil the lust of the flesh.
This I say then - explaining Galatians 5:13, 'What I mean is this.'
Walk in the Spirit - `By х Pneumati (G4151)] the (Holy) Spirit' (as your governing principle, rule) (Acts 15:1; Galatians 6:16; Philippians 3:16: cf. Galatians 5:16-18; Galatians 5:22; Galatians 5:25; Galatians 6:1-8, with Romans 7:22; Romans 8:2; Romans 8:9; Romans 8:11). The best way to keep tares out of a bushel is to fill it with wheat.
The flesh - the natural man, moving in the world of sense and self only. Its manifestations are various (Galatians 5:19-21). The spirit and the flesh mutually exclude one another. It is promised, not that we should have no evil lusts, but that we should "not fulfil" them. If the spirit in us can be at ease under sin, it is not a spirit that comes from the Holy Spirit. The gentle dove trembles at the sight even of a hawk's feather.