The children of this world' would have, for their natural antithesis, the children of another world. The children of light' would have, for their natural antithesis, the children of darkness.' But our Lord so orders His words as to suggest a double antithesis, one member of which has to be supplied in each case, and He would teach us that whoever the children of this world may be, they are children of darkness ; and that the children of light' are so, just because they are the children of another world than this. Thus He limits His praise, because it is the sons of darkness that, in a certain sense, are wiser than the enlightened ones. And that is what makes the wonder and the inconsistency to which our Lord is pointing. We can understand a man being a consistent, thorough-paced fool all through. But men whose folly is so dashed and streaked with wisdom, and others whose wisdom is so spotted and blurred with folly, are the extraordinary paradoxes which experience of life presents to us.
The children of this world are of darkness; the children of light are the children of another world. Now I need not spend more than a sentence or two in further explaining these two antitheses. I do not intend to vindicate them, or to vindicate our Lord's distinct classification of men into these two halves. What does He mean by the children of this world? The old Hebrew idiom, the children of so-and-so, simply suggests persons who are so fully possessed and saturated with a given quality, or who belong so entirely to a given person, as that they are spoken of as if they stood to it, or to him, in the relation of children to their parents. And a child of this world is a man whose whole thoughts, aims, and objects of life are limited and conditioned by this material present. But the word which is employed here, translated rightly enough world,' is not the same as that which is often used, especially in John's writings, for the same idea. Although it conveys a similar idea, still it is different. The characteristic quality of the visible and material world which is set forth by the expression here employed is its transiency. The children of this epoch' rather than of this world' is the meaning of the phrase. And it suggests, not so much the inadequacy of the material to satisfy the spiritual, as the absurdity of a man fixing his hopes and limiting his aims and life-purpose within the bounds of what is destined to fade and perish. Fleeting wealth, fleeting honours, mortal loves, wisdom, and studies that pass away with the passing away of the material; these, however elevating some of them may be, however sweet some of them may be, however needful all of them are in their places, are not the things to which a man can safely lash his being, or entrust his happiness, or wisely devote his life. And therefore the men who, ignoring the fact that they live and the world passes, make themselves its slaves, and itself their object, are convicted by the very fact of the disproportion between the duration of themselves and of that which is their aim, of being children of the darkness.
Then we come to the other antithesis. The children of light are so in the measure in which their lives are not dependent exclusively upon, nor directed solely towards, the present order and condition of things. If there be a this, then there is a that. If there be an age which is qualified as being present, then that implies that there is an age or epoch which is yet to come. And that coming age' should regulate the whole of our relations to that age which at present is. For life is continuous, and the coming epoch is the outcome of the present. As truly as the child is father of the man,' so truly is Eternity the offspring of Time, and that which we are to-day determines that which we shall be through the ages. He that recognises the relations of the present and the future, who sees the small, limited things of the moment running out into the dim eternity beyond, and the track unbroken across the gulfs of death and the broad expanse of countless years, and who therefore orders the little things here so as to secure the great things yonder, he, and only he, who has made time the lackey to eternity,' and in his pursuit of the things seen and temporal, regards them always in the light of things unseen and eternal, is a child of light.