The true reading is,' Walk as children of light, for the fruit of the light' (not spirit, as the Authorised Version reads it) is in all goodness and righteousness and truth.' Now, it is obvious that the alteration of light' instead of spirit' brings the words into connection with the preceding and the following. The reference to the fruits of the spirit' would be entirely irrelevant in this place; a reference to the fruit of the light,' as being every form of goodness and righteousness and truth, is altogether in place.
There is, then, a natural tendency in the light to blossom out into all forms and types of goodness. Fruit' suggests the idea of natural, silent, spontaneous, effortless growth. And, although that is by no means a sufficient account of the process by which bad men become good men, it is an inseparable element, in all true moral renovation, that it be the natural outcome and manifestation of an inward principle; otherwise it is mere hypocritical adornment, or superficial appearance. If we are to do good we must first of all be good. If from us there are to come righteousness and truth, and all other graces of character, there must, first of all, be the radical change which is involved in passing from separateness in the darkness to union with Jesus Christ in the light. The Apostle's theory of moral renovation is that you must begin with the implantation in the spirit of the source of all moral goodness--viz. Jesus Christ--brought into the heart by the uniting power of humble faith. And then there will be lodged in our being a vital power, of which the natural outcome will be all manner of fair and pure things. Effort is needed, as I shall have to say; but prior to effort there must be union with Jesus Christ.
This wide, general commandment of our text is sufficiently definite, thinks Paul; for if the light be in you it will naturally effloresce into all forms of beauty. Light is the condition of fruitfulness. Everywhere the vital germ is only acted upon by the light. No sunshine, no flowers; darkness produces thin, etiolated, whitened, and feeble shoots at the best. Let the light blaze in, and the blanched feebleness becomes vigorous and unfolds itself. How much more will light be the condition of fruitfulness when the very light itself is the seed from which all fruit is developed.
But, still further, mark how there must be an all-round completeness in order that we shall fairly set forth the glory and power of the light of which our faith makes us children and partakers. The fruit is in all goodness and righteousness and truth.' These three aspects--the good, the right, the true--may not be a scientific, ethical classification, but they give a sufficiently plain and practical distinction. Goodness, in which the prevailing idea is beneficence and the kindlier virtues; righteousness, which refers to the sterner graces of justice; truth, in which the prevalent idea is conformity in action with facts and the conditions of man's life and entire sincerity--these three do cover, with sufficient completeness, the whole ground of possible human excellence. But the Apostle widens them still further by that little word all.
We all tend to cultivate those virtues which are in accordance with our natural dispositions, or are made most easy to us by our circumstances. And there is nothing in which we more need to seek comprehensiveness than in the effort to educate ourselves into, and to educe from ourselves, kinds of goodness and forms of excellence which are not naturally in accordance with our dispositions, or facilitated by our circumstances. The tree planted in the shrubbery will grow all lopsided; the bushes on the edge of the cliff will be shorn away on the windward side by the teeth of the south-western gale, and will lean over northwards, on the side of least resistance. And so we all are apt to content ourselves with doing the good things that are easiest for us, or that fit into our temperament and character. Jesus Christ would have us to be all-round men, and would that we should seek to aim after and possess the kinds of excellence that are least cognate to our characters. Are you strong, and do you pride yourself upon your firmness? Cultivate gentleness. Are you amiable, and pride yourself, perhaps, upon your sympathetic tenderness? Try to get a little iron and quinine into your constitution. Seek to be the man that you are least likely to be, and aim at a comprehensive development of all righteousness and goodness and truth.'
Further, remember that this all-round completeness is not attained as the result of an effortless growth. True, these things are the fruits of the light, but also true, they are the prizes of struggle and the trophies of warfare, No man will ever attain to the comprehensive moral excellence which it is in his own power to win; no Christian will ever be as all-round a good man as he has the opportunities of being, unless he makes it his business, day by day, to aim after the conscious increase of gifts that he possesses, and the conscious appropriation and possession of those of which he is still lacking. Nothing of itself will come,' or very little. True, the light will shine out in variously tinted ray if it be in a man, as surely as from the seed come the blade and the ear and the full corn in the ear, but you will not have nor keep the light which thus will unfold itself unless you put forth appropriate effort. Christ comes into our hearts, but we have to bring Him there. Christ dwells in our hearts, but we have to work into our nature, and work out in action, the gifts that He bestows. They will advance but little in the divine life who trust to the natural unfolding of the supernatural life within them, and do not help its unfolding by their own resolute activity. Walk as children of the light.' There is your duty, for the fruit of the light is all righteousness.' One might have supposed that the commandments would be, Be passive as children of the light, for the light will grow.' But the Apostle binds together, as always, the two things, the divine working and the human effort at reception, retention, and application of that divine work, just as he does in the great classical passage, Work out your own salvation, for it is God that worketh in you.'