In the first place, there is in man a deep sense of the analogies of things, partly developed by the organic tendency to regard any given object of perception as subjective and causative, and to infuse into it our own animal life, a tendency confirmed by education and the practice of daily life. Such analogies, which find their expression in metaphor, are very vivid and persistent in the vulgar and in those persons who approximate most closely to the primitive ingenuousness of the intelligence. The most frequent analogies are between natural phenomena and objects and animal forms. Analogies are also found between the various forms of inanimate natural objects, but the former are more usual, and especially those which refer to the human form. There are numerous and familiar instances of the names of men or women given to mountains, rocks, and crags, because they have some remote resemblance to some human feature or limb. Every day we may be called upon to see a face in some mountain, stone, or trunk of a tree, in the outline of the landscape, a wreath of mist or cloud. We are told to observe the eyes, nose, mouth, the arms and legs, and so on.[35] Every one must remember to have often heard of such resemblances, even if he has not himself observed them. All the facts and laws which we have observed explain why the sudden appearance of some vague form in an uncertain light, reminding us in a confused way of the human figure, instantly causes us to trace a resemblance to man rather than to any thing else. It must be noted, as my experiment has already proved, that in this first sketch of a phantasm in human form, a general, though indefinite type of the whole figure has spontaneously arisen, to which it is made to correspond. This is the key to the ultimate perception of the phenomenon. What may be called the prophetic type of the figure which will afterwards appear to us in all its details, although it may seem to be produced by external resemblance, is in fact the product of the mind, which has been unconsciously exercised in its construction.