All known religious beliefs, whether simple or complex, present one common characteristic: they presuppose a classification of all the things, real and ideal, of which men think, into two classes or opposed groups, generally designated by two distinct terms which are translated well enough by the words _profane_ and _sacred_ (_profane_, _sacré_). This division of the world into two domains, the one containing all that is sacred, the other all that is profane, is the distinctive trait of religious thought; the beliefs, myths, dogmas and legends are either representations or systems of representations which express the nature of sacred things, the virtues and powers which are attributed to them, or their relations with each other and with profane things. But by sacred things one must not understand simply those personal beings which are called gods or spirits; a rock, a tree, a spring, a pebble, a piece of wood, a house, in a word, anything can be sacred. A rite can have this character; in fact, the rite does not exist which does not have it to a certain degree. There are words, expressions and formulæ which can be pronounced only by the mouths of consecrated persons; there are gestures and movements which everybody cannot perform. If the Vedic sacrifice has had such an efficacy that, according to mythology, it was the creator of the gods, and not merely a means of winning their favour, it is because it possessed a virtue comparable to that of the most sacred beings. The circle of sacred objects cannot be determined, then, once for all. Its extent varies infinitely, according to the different religions. That is how Buddhism is a religion: in default of gods, it admits the existence of sacred things, namely, the four noble truths and the practices derived from them.[65] Up to the present we have confined ourselves to enumerating a certain number of sacred things as examples: we must now show by what general characteristics they are to be distinguished from profane things.