I. What it is to walk in the Spirit.
The thought which is but touched upon here is set forth more largely, and if we may so say, profoundly, in the Epistle to the Romans (chap. viii.). There, to walk after the flesh, is substantially the same as to be carnally minded, and that 'mind of the flesh' is regarded as being by fatal necessity not 'subject to the law of God,' and consequently as in itself, with regard to future consequences, to be death. The fleshly mind which is thus in rebellion against the law of God is sure to issue in 'desires of the flesh,' just as when the pressure is taken off, some ebullient liquid will bubble. They that are after the flesh of course will 'mind the things of the flesh.' The vehement desires which we cherish when we are separated from God and which we call sins, are graver as a symptom than even they are in themselves, for they show which way the wind blows, and are tell-tales that betray the true direction of our nature. If we were not after the flesh we should not mind the things of the flesh. The one expression points to the deep-seated nature, the other to the superficial actions to which it gives rise.
And the same duality belongs to the life of those who are 'after the Spirit.' 'To walk,' of course, means to carry on the practical life, and the Spirit is here thought of not so much perhaps as the path on which we are to travel, but rather as the norm and direction by which we are to travel on life's common way. Just as the desires of the flesh were certain to be done by those who in their deepest selves belonged to the flesh, so every soul which has received the unspeakable gift of newness of life through the Spirit of God will have the impulses to mind and do the things of the Spirit. If we live in the Spirit we shall also—and let us also—walk in the Spirit.
But let us make no mistakes, or think that our text in its great commandment and radiant hope has any word of cheer to those who have not received into their hearts, in however feeble a manner and minute a measure, the Spirit of the Son. The first question for us all is, have we received the Holy Ghost?—and the answer to that question is the answer to the other, have we accepted Christ? It is through Him and through faith in Him that that supreme gift of a living spirit is bestowed. And only when our spirits bear witness with that Spirit that we are the children of God, have we a right to look upon the text as pointing our duty and stimulating our hope. If our practical life is to be directed by the Spirit of God, He must enter into our spirits, and we shall not be in Him but in the measure that He is in us. Nor will our spirits be life because of righteousness unless He dwells in us and casts forth the works of the flesh. There will be no practical direction of our lives by the Spirit of God unless we make conscience of cultivating the reception of His life-giving and cleansing influences, and unless we have inward communion with our inward guide, intimate and frank, prolonged and submissive. If we are for ever allowing the light of our inward godliness to be blown about by gusts, or to show in our inmost hearts but a faint and flickering spark, how can we expect that it will shine safe direction on our outward path?
II. Such walking in the Spirit conquers the flesh.
We all know it as a familiar experience that the surest way to conquer any strong desire or emotion is to bring some other into operation. To concentrate attention on any overmastering thought or purpose, even if our object is to destroy it, is but too apt to strengthen it. And so to fix our minds on our own desires of the flesh, even though we may be honestly wishing to suppress them, is a sure way to invest them with new force; therefore the wise counsels of sages and moralists are, for the most part, destined to lead those who listen to them astray. Many a man has, in good faith, set himself to conquer his own evil lusts and has found that the nett result of his struggles has been to make the lusts more conspicuous and correspondingly more powerful. The Apostle knows a better way, which he has proved to his own experience, and now, with full confidence and triumph, presses upon his hearers. He would have them give up the monotonous and hopeless fight against the flesh and bring another ally into the field. His chief exhortation is a positive, not a negative one. It is vain to try to tie up men with restrictions and prohibitions, which when their desires are stirred will be burst like Samson's bonds. But if once the positive exhortation here is obeyed, then it will surely make short work of the desires and passions which otherwise men, for the most part, do not wish to get rid of, and never do throw off by any other method.
We have pointed out that in our text to walk in the Spirit means to regulate the practical life by the Spirit of God, and that the 'desires of the flesh' mean the desires of the whole human nature apart from God. But even if we take the contrasted terms in their lower and commonly adopted sense, the text is true and useful. A cultivated mind habituated to lofty ideas, and quick to feel the nobility of 'spiritual' pursuits and possessions, will have no taste for the gross delights of sense, and will recoil with disgust from the indulgences in which more animal natures wallow. But while this is true, it by no means exhausts the great principle laid down here. We must take the contrasted terms in their fullest meaning if we would arrive at it. The spiritual life derived from Jesus Christ and lodged in the human spirit has to be guarded, cherished and made dominant, and then it will drive out the old. If the Spirit which is life because of righteousness is allowed free course in a human spirit, it will send forth its powers into the body which is 'dead because of sin,' will regulate its desires, and if needful will suppress them. And it is wiser and more blessed to rely on this overflowing influence than to attempt the hopeless task of coercing these desires by our own efforts.
If we walk in the Spirit, we shall thereby acquire new tastes and desires of a higher kind which will destroy the lower. They to whom manna is sweet as angel's food find that they have lost their relish for the strong-smelling and rank-flavoured Egyptian leeks and garlic. A guest at a king's table will not care to enter a smoky hovel and will not be hungry for the food to be found there. If we are still dependent on the desires of the flesh we are still but children, and if we are walking in the Spirit we have outgrown our childish toys. The enjoyment of the gifts which the Spirit gives deadens temptation and robs many things that were very precious of their lustre.
We may also illustrate the great principle of our text by considering that when we have found our supreme object there is no inducement to wander further in the search after delights. Desires are confessions of discontent, and though the absolute satisfaction of all our nature is not granted to us here, there is so much of blessedness given and so many of our most clamant desires fully met in the gift of life in Christ, that we may well be free from the prickings of desires which sting men into earnest seeking after often unreal good. 'The fruit of the Spirit is love, joy, peace,' and surely if we have these we may well leave the world its troubled delights and felicities. Christ's joy remains in us and our joy is full. The world desires because it does not possess. When a deeper well is sunk, a shallower one is pretty sure to give out. If we walk in the Spirit we go down to the deepest water-holding stratum, and all the surface wells will run dry.
Further, we may note, that this walking in the Spirit brings into our lives the mightiest motives of holy living and so puts a bridle on the necks and a bit in the mouths of our untamed desires. Holding fellowship with the divine Indweller and giving the reins into His strong hand, we receive from Him the spirit of adoption and learn that if we are children then are we heirs. Is there any motive that will so surely still the desires of the flesh and of the mind as the blessed thought that God is ours and we His? Surely their feet should never stumble or stray, who are aware of the Spirit of the Son bearing witness with their spirit that they are the children of God. Surely the measure in which we realise this will be the measure in which the desires of the flesh will be whipped back to their kennels, and cease to disturb us with their barks.
The whole question here as between Paul and his opponents just comes to this; if a field is covered with filth, whether is it better to set to work on it with wheel-barrows and shovels, or to turn a river on it which will bear away all the foulness? The true way to change the fauna and flora of a country is to