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.