But how has it come to pass that there should have occurred, even in the small degree in which we admit it, a loss of the sureness which means so much in the preaching of the word of truth? The question is a large one, and to answer it fully much more than all the paper composing this book would be required. It may be that the spirit of the age is not a spirit favourable to belief. In some periods faith is glorified; in others, doubt. In these days, it might be thought from much we hear, a little scepticism is the one sure evidence of intellectuality; while steadfastness in the creed of one's youth proves the possession of a dull and narrow mind and the existence of that hopeless mental condition known as fossilisation. Ours are the days of science, and science has frightened some people terribly concerning religion, though it would almost appear that she is now beginning, in some measure, to repent, and is turning to soothe the timorous souls whom she formerly terrified. Ours are days of criticism too, and the criticism has largely been concerned with the very writings wherein are recorded those words upon which we have relied as containing the way of life. Some things said to have been discovered have disturbed us a little, though why they should have done so it is difficult, upon reflection, to see. We have been too prone, perhaps, to surrender ourselves to such a feeling as is natural to those anxious moments when, having called a consultant to the bedside of a sick friend, we have just uttered the request, "Now, Doctor, tell us candidly the worst." All these things would be mentioned in the long history which would be needed fully to narrate the causes of the slight slackening of faith noted here and there; but, for all the importance which would probably be ascribed to each in turn, they are not the only reasons; they are not even the chief reasons. Those, we are bold to say, are not intellectual, but moral and spiritual! And these moral and spiritual causes of doubt in relation to eternal and divine things will emerge as we proceed to try to answer the question, which now arises, as to how we can recover that measure of certainty which we have lost, and which we must regain, with additions, if we would achieve that power in the work of preaching which is needed to turn the hearts of men towards God and goodness. Notwithstanding all that may be said as to the difficulties of the situation, we venture to think that the lines upon which confidence may be won back again are not impossible of discernment.