The same idea which, as I have already remarked, is conveyed by the image of a new creation, is reiterated in this metaphor of putting on the new nature, as if it were a garment. Our task is not to weave it, but to wear it. It is made and ready.
And that process of assumption or putting on has two parts. We are clothed upon with Christ in a double way, or rather in a double sense. We are found in Him not having our own righteousness,' but invested with His for our pardon and acceptance. We are clothed with His righteousness for our purifying and sanctifying.
Both are the conditions of our being like God. Both are the gifts of God. The one, however, is an act; the other a process. Both are received. The one is received on condition of simple faith; the other is received by the medium of faithful effort. Both are included in the wide conception of salvation, but the law for the one is Not by works of righteousness which we have done, but by His mercy He saved us'; and the law for the other is--Work out your own salvation with fear and trembling.' Both come from Christ, but for the one we have the invitation, Buy of Me white raiment that thou mayest be clothed'; and for the other we have the command, Put on the Lord Jesus Christ, and make not provision for the flesh.' There is the assumption of His righteousness which makes a man a Christian, and has for its condition simple faith. There is the assumption of His righteousness sanctifying and transforming us which follows in a Christian course, as its indispensable accompaniment and characteristic, and that is realised by daily and continuous effort.
And one word about the manner, the effort as set forth here; twofold, as I have already pointed out--a negative and positive. We are not concerned here with the relations of these amongst themselves, but I may remark that there is no growth in holiness possible without the constant accompanying process of excision and crucifixion of the old. If you want to grow purer and liker Christ, you must slay yourselves. You cannot gird on righteousness' above the old self, as some beggar might buckle to himself royal velvet with its ermine over his filthy tatters. There must be a putting off in order to and accompanying the putting on. Strip yourselves of yourselves, and then you shall not be found naked,' but clothed with the garments of salvation, as the bride with the robe which is the token of the bridegroom's love, and the pledge of her espousals to him.
And let nobody wonder that the Apostle here commands us, as by our own efforts, to put on and make ours what is in many other places of Scripture treated as God's gift. These earnest exhortations are perfectly consistent with the belief that all comes from God. Our faithful adherence to our Lord and Master, our honest efforts in His strength to secure more and more of His likeness, determine the extent to which we shall possess that likeness. The new nature is God's gift, and it is given to us according to His own fulness indeed, but also according to the measure of our faith. Blessed be His name! we have nothing to do but to accept His gift. The garment with which He clothes our nakedness and hides our filth is woven in no earthly looms. As with the first sinful pair, so with all their children since, the Lord God made them' the covering which they cannot make for themselves. But we have to accept it, and we have by daily toil, all our lives long, to gather it more and more closely around us, to wrap ourselves more and more completely in its ample folds. We have by effort and longing, by self-abnegation and aspiration, by prayer and work, by communion and service, to increase our possession of that likeness to God which lives in Jesus Christ, and from Him is stamped ever more and more deeply on the heart. For the strengthening of our confidence and our gratitude, we have to remember with lowly trust that it is true of us, If any man be in Christ he is a new creature.' For the quickening of our energy and faithful efforts we have to give heed to the command, and fulfil it in ourselves--Be ye renewed in the Spirit of your minds, and put on the new man.'
