The fable proper is composed of two parts, of which one may be termed the body, and the other the soul. The body is the subject-matter of the fable, and the soul is the moral. Aristotle will admit none but animals into the domain of fabledom, and rigorously excludes from it both men and plants. This rule, however, cannot be strictly necessary, since neither Æsop, Phædrus, nor any of the fabulists[7] have observed it; but, on the other hand, a moral is to a fable an indispensable adjunct, and if I have in any instances omitted it, it is only in those cases in which it could not be gracefully introduced, or in which it was so obvious that the reader could deduce it for himself. The great rule in France is to value only that which pleases, and I have thought it no crime, therefore, to cancel ancient customs when they would not harmonise with modern ones. In Æsop's time the fable was first related as a simple story, and then supplemented by a moral which was distinct in itself. Next Phædrus came, who was so far from complying with this rule, that he sometimes transposed the moral from the end to the commencement. For my own part, I have never failed to follow Æsop's rule, except when it was necessary to observe a no less important one laid down by Horace, to the effect that no writer should obstinately struggle against the natural bent of his mind or the capabilities of his subject. A man, he asserts, who wishes to succeed will never pursue such a course, but will at once abandon a subject when he finds that he cannot mould it into a creditable shape: "Et quæ Desperat tractata intescere posse, relinquit."[8]