Yet another paradox attaches to the Christian life, inasmuch as God cleanses us, but we have to cleanse ourselves. The great truth that the spirit of God in a man is the fontal source of all his goodness, and that Christ's righteousness is given to us, is no pillow on which to rest an idle head, but should rather be a trumpet-call to effort which is thereby made certain of success. If we were left to the task of self-purifying by our own efforts we might well fling it up as impossible. It is as easy for a man to lift himself from the ground by gripping his own shoulders as it is for us to rise to greater heights of moral conduct by our own efforts; but if we can believe that God gives the impulse after purity, and the vision of what purity is, and imparts the power of attaining it, strengthening at once our dim sight and stirring our feeble desires and energising our crippled limbs, then we can 'run with patience the race that is set before us.'
We must note the thoroughness of the cleansing which the Apostle here enjoins. What is to be got rid of is not this or that defect or vice, but '_all_ filthiness of flesh and spirit.' The former, of course, refers primarily to sins of impurity which in the eyes of the Greeks of Corinth were scarcely sins at all, and the latter to a state of mind when fancy, imagination, and memory were enlisted in the service of evil. Both are rampant in our day as they were in Corinth. Much modern literature and the new gospel of 'Art for Art's sake' minister to both, and every man carries in himself inclinations to either. It is no partial cleansing with which Paul would have us to be satisfied: '_all_' filthiness is to be cast out. Like careful housewives who are never content to cease their scrubbing while a speck remains upon furniture, Christian men are to regard their work as unfinished as long as the least trace of the unclean thing remains in their flesh or in their spirit. The ideal may be far from being realised at any moment, but it is at the peril of the whole sincerity and peacefulness of their lives if they, in the smallest degree, lower the perfection of their ideal in deference to the imperfection of their realisation of it.