Andrew murray writes:
Scripture teaches us that there are but two conditions possible for the Christian. One is a walk according to the Spirit, the other a walk according to 'the flesh'. These two powers are in irreconcilable conflict with each other. So it comes to pass, in the case of the majority of Christians, that, while we thank God that they are born again through the Spirit and have received the life of God - yet their ordinary daily life is not lived according to the Spirit but according to 'the flesh'. Paul writes to the Galatians: 'Are ye so foolish? having begun in the Spirit, are ye now made perfect by the flesh?' (Gal. 3.3). Their service lay in fleshly outward performances. They did not understand that where 'the flesh' is permitted to influence their service of God, it soon results in open sin.
So he mentions not only grave sins as the work of 'the flesh', such as adultery, murder, drunkenness; but also the more ordinary sins of daily life - wrath, strife, variance; and he gives the exhortation: 'Walk in the Spirit, and ye shall not fulfill the lust of the flesh... If we live in the Spirit, let us also walk in the Spirit' (Gal. 5.16, 25). The Spirit must be honoured not only as the author of a new life but also as the leader and director of our entire walk. Otherwise we are what the apostle calls 'carnal'.
"Be still and know that I am God"