The imagination is, as Coleridge says, the great unifying power; it draws together things that are apparently remote. But its analogies to be of value should surely have validity apart from the mere shifting mood of the man who perceives them. Otherwise he simply wrests some outer object from the chain of cause and effect of which it is actually a part, and incorporates it arbitrarily into his own private dream. Wordsworth is not sparing of homely detail in his account of his leech-gatherer; but at a given moment in this poem the leech-gatherer undergoes a strange transformation; he loses all verisimilitude as a leech-gatherer and becomes a romantic symbol, a mere projection, that is, of the poet’s own broodings. To push this symbolizing of mood beyond a certain point is incipient hallucination. We are told that when the asylum at Charenton was shelled in the Franco-Prussian War of 1870, the lunatics saw reflected in the bursting bombs, each in a different way, his own madness. One took the bombs to be a link in the plot of his enemies against him, etc. It is hard to consider the symbolizing and visions of the extreme romanticist, such as those of William Blake, without thinking at times of Charenton. What I have said of the romantic symbol is true in some degree of the romantic metaphor, for the symbol and even the myth are often only a developed metaphor. The first part of the romantic metaphor, the image or impression that has been received from the outer world, is often admirably fresh and vivid.[220] But the second part of the metaphor when the analogy involved is that between some fact of outer perception and the inner life of man is often vague and misty; for the inner life in which the romanticist takes interest is not the life he possesses in common with other men but what is most unique in his own emotions--his mood in short. That is why the metaphor and still more the symbol in so far as they are romantic are always in danger of becoming unintelligible, since it is not easy for one man to enter into another’s mood. Men accord a ready welcome to metaphors and symbols that instead of expressing something more or less individual have a real relevancy to their common nature. Tribulation, for example, means literally the beating out of grain on the threshing floor. The man who first saw the analogy between this process and certain spiritual experiences established a legitimate link between nature and human nature, between sense and the supersensuous. Language is filled with words and expressions of this kind which have become so current that their metaphorical and symbolical character has been forgotten and which have at the same time ceased to be vivid and concrete and become abstract.