The word religion is used in many different meanings, and there have been not a few controversies in which the main difference between the contending parties was only this, that they understood by religion two different things. I will therefore begin by setting forth as clearly as I can one or two of the meanings which the word appears to have in popular speech. First, then, it may mean a body of doctrines, as in the common phrase, 'The truth of the Christian religion;' or in this sentence, 'The religion of the Buddha teaches that the soul is not a distinct substance.' Opinions differ upon the question what doctrines may properly be called religious; some people holding that there can be no religion without belief in a God and in a future life, so that in their judgment the body of doctrines must necessarily include these two; while others would insist upon other special dogmas being included, before they could consent to call the system by this name. But the number of such people is daily diminishing, by reason of the spread and the increase of our knowledge about distant countries and races. To me, indeed, it would seem rash to assert of any doctrine or its contrary that it might not form part of a religion. But, fortunately, it is not necessary to any part of the discussion on which I propose to enter that this question should be settled. Secondly, religion may mean a ceremonial or cult, involving an organized priesthood and a machinery of sacred things and places. In this sense we speak of the clergy as ministers of religion, or of a state as tolerating the practice of certain religions. There is a somewhat wider meaning which it will be convenient to consider together with this one, and as a mere extension of it, namely, that in which religion stands for the influence of a certain priesthood. A religion is sometimes said to have been successful when it has got its priests into power; thus some writers speak of the wonderfully rapid success of Christianity. A nation is said to have embraced a religion when the authorities of that nation have granted privileges to the clergy, have made them as far as possible the leaders of society, and have given them a considerable share in the management of public affairs. So the northern nations of Europe are said to have embraced the Catholic religion at an early date. The reason why it seems to me convenient to take these two meanings together is, that they are both related to the priesthood. Although the priesthood itself is not called religion, so far as I know, yet the word is used for the general influence and professional acts of the priesthood.