I say then, Walk in the Spirit. The summary, the one aim of the whole of this Epistle, is this: Walk not in the law, not in the flesh, but in the Spirit. The root of all your trouble is want of the Spirit: if you had Him, you would shut out as well the legal as the carnal life.
To walk in the Spirit is to order our whole life after the impulse of the Spirit, who inspired us to works of piety, to prayer, faith, charity, and works of mercy. This Spirit the Apostles received abundantly at Pentecost, as did the first Christians, and they added to the gift they then received by loyally following His workings, by labouring and suffering everything, if only they might bring others to Christ, by fiery charity and burning zeal. Whither has fled that Spirit now? Lord Jesus, kindle in us that fire which Thou camest to send on earth, and which Thou didst will to burn vehemently.
The whole essence of the gospel is to think according to the Spirit, to live according to the Spirit, to believe according to the Spirit, to have nothing of the flesh in one’s mind and acts and life. That means also having no hope in the flesh. “Walk, then,” he says, “in the Spirit”—that is, “Be alive. If you do so you will not consummate the desire of the flesh. You will admit into consciousness no sin, which is born of the flesh.” .
See how he also shows a better way. It makes virtue uncomplicated and rightly accomplishes what he has previously said—a way that brings forth love and is sustained by love. For nothing, nothing makes people so lovable as to be formed by the Spirit. And nothing so causes the Spirit to abide in us as the strength of love…. After having stated the cause of the illness, he also shows the remedy that bestows health.
Here he points out another path which makes duty easy, and secures what had been said, a path whereby love is generated, and which is fenced in by love. For nothing, nothing I say, renders us so susceptible of love, as to be spiritual, and nothing is such an inducement to the Spirit to abide in us, as the strength of love. Therefore he says, Walk by the Spirit and you shall not fulfil the lust of the flesh: having spoken of the cause of the disease, he likewise mentions the remedy which confers health. And what is this, what is the destruction of the evils we have spoken of, but the life in the Spirit? Hence he says, Walk by the Spirit and you shall not fulfil the lust of the flesh.
And because unclean, it is actively sinful, and suffuses even the flesh (by reason of their conjunction) with its own shame. Now although the flesh is sinful, and we are forbidden to walk in accordance with it,
