The science of religion deals essentially with the one fact that religion has existed and does exist. It is from that fact that the missionary will start; and it is with men who do not question the fact that he will have to do. The science of religion seeks to trace the historic growth, the evolution of religion; to establish what actually was, not to {7} judge what ought to have been,--science knows no "ought," in that sense or rather in that tense, the past tense. Its work is done, its last word has been said, when it has demonstrated what was. It is the heart which sighs to think what might have been, and which puts on it a higher value than it does on what actually came to pass. There is then another order in which facts may be ranged besides the chronological order in which historically they occurred; and that is the order of their value. It is an order in which we do range facts, whenever we criticise them. It is the order in which we range them, whenever we pass judgment on them. Or, rather, passing judgment on them is placing them in the order of their value. And the chronological order of their occurrence is quite a different thing from the order in which we rank them when we judge them according to their value and importance. It is, or rather it would be, quite absurd to say, in the case of literature, or art, for instance, that the two orders are identical. There it is obvious and universally admitted that one period may reach a higher level than another which in point of time is later. The classical period is followed by a post-classical period; culmination is followed by decline. {8} Now, this difference in point of the literary or artistic value of two periods is as real and as fundamental as the time order or chronological relation of the two periods. It would be patently ridiculous for any ardent maintainer of the importance of distinguishing between good literature and bad, good art and bad art, to say that the one period, being good, must have been chronologically prior to the other, because, from the point of art, it was better than that other. Every one can see that. The chronological order, the historic order, is one thing; the order of literary value or artistic importance is another. But if this is granted, and every one will grant it, then it is also, and thereby, granted that the historic order of events is not the same thing as the order of their value, and is no guide to it. Thus far I have illustrated these remarks by reference to literary and artistic values. But I need hardly say that I have been thinking really all the time of religious values. If the student of literature or of art surveys the history of art and literature with the purpose of judging the value of the works produced, the student of religion may and must survey the history of religion with the same purpose. If the one student is entitled, as he {9} justly is entitled, to say that the difference