Walk whilst ye have the light, lest the darkness come upon you.' That is the summing up of the whole history of that stiff-necked and marvellous people. For what has all the history of Israel been since that day but groping in the wilderness without any pillar of fire? But there is more than that in it. Christ gives us this one solemn warning of what falls on us if we turn away from Him. Rejected light is the parent of the densest darkness, and the man who, having the light, does not trust it, piles around himself thick clouds of obscurity and gloom, far more doleful and impenetrable than the twilight that glimmers round the men who have never known the daylight of revelation. The history of unChristian and antiChristian Christendom is a terrible commentary upon these words of the Master, and the cries that we hear all round us to-day from men who will not follow the light of Christ, and moan or boast that they dwell in agnostic darkness, tell us that, of all the eclipses that can fall upon heart and mind, there is none so dismal or thunderously dark as that of the men who, having seen the light of Christ in the sky, have turned from it and said, It is no light, it is only a mock sun.' Brethren, tempt not that fate.
And if Christian men and women do not advance in their knowledge and their conformity, like clouds of darkness will fall upon them. None is so hopeless as the unprogressive Christian, none so far away as those who have been brought nigh and have never come any nigher. If you believe the light, see that you growingly trust and walk in it, else darkness will come upon you, and you will not know whither you go.