Moreover, if we give the name delirious to every state in which the mind adds to the immediate data given by the senses and projects its own sentiments and feelings into things, then nearly every collective representation is in a sense delirious; religious beliefs are only one particular case of a very general law. Our whole social environment seems to us to be filled with forces which really exist only in our own minds. We know what the flag is for the soldier; in itself, it is only a piece of cloth. Human blood is only an organic liquid, but even to-day we cannot see it flowing without feeling a violent emotion which its physico-chemical properties cannot explain. From the physical point of view, a man is nothing more than a system of cells, or from the mental point of view, than a system of representations; in either case, he differs only in degree from animals. Yet society conceives him, and obliges us to conceive him, as invested with a character _sui generis_ that isolates him, holds at a distance all rash encroachments and, in a word, imposes respect. This dignity which puts him into a class by himself appears to us as one of his distinctive attributes, although we can find nothing in the empirical nature of man which justifies it. A cancelled postage stamp may be worth a fortune; but surely this value is in no way implied in its natural properties. In a sense, our representation of the external world is undoubtedly a mere fabric of hallucinations, for the odours, tastes and colours that we put into bodies are not really there, or at least, they are not such as we perceive them. However, our olfactory, gustatory and visual sensations continue to correspond to certain objective states of the things represented; they express in their way the properties, either of material particles or of ether waves, which certainly have their origin in the bodies which we perceive as fragrant, sapid or coloured. But collective representations very frequently attribute to the things to which they are attached qualities which do not exist under any form or to any degree. Out of the commonest object, they can make a most powerful sacred being.