Metaphors abound in all writings. In the scriptures they may be found in vast variety. Thus, our blessed Lord is called a vine, a lamb, a lion, &c.; and men, according to their different dispositions, are styled wolves, sheep, dogs, serpents, vipers, &c.
Washington Irving, in speaking of the degraded state of the American Aborigines who linger on the borders of the "white settlements," employs the following beautiful metaphor: "The proud pillar of their independence has been shaken down, and the whole moral fabric lies in ruins."
2. AN ALLEGORY may be regarded as a metaphor continued; or it is several metaphors so connected together in sense, as frequently to form a kind of parable or fable. It differs from a single metaphor, in the same manner that a cluster on the vine differs from a single grape.
The following is a fine example of an allegory, taken from the 60th psalm; wherein the people of Israel are represented under the image of a vine. "Thou hast brought a vine out of Egypt: thou hast cast out the heathen and planted it. Thou preparedst room before it; and didst cause it to take deep root, and it filled the land. The hills were covered with the shadow of it, and the boughs thereof were like the goodly cedars. She sent out her boughs into the sea, and her branches into the river."
3. A SIMILE or COMPARISON is when the resemblance between two objects, whether real or imaginary, is expressed in form.
Thus, we use a simile, when we say, "The actions of princes are like those great rivers, the course of which every one beholds, but their springs have been seen by few." "As the mountains are round about Jerusalem, so the Lord is round about his people." "The music of Caryl was like the memory of joys that are past, pleasant and mournful to the soul." "Our Indians are like those wild plants which thrive best in the shade, but which wither when exposed to the influence of the sun."
4. A METONYMY is where the cause is put for the effect, or the effect for the cause; the container for the thing contained; or the sign for the thing signified.
When we say, "They read Milton," the cause is put for the effect, meaning "Milton's works." "Gray hairs should be respected;" here the effect is put for the cause; meaning by "gray hairs," old age, which produces gray hairs. In the phrase, "The kettle boils," the container is substituted for the thing contained. "He addressed the chair;" that is, the person in the chair.
5. A SYNECDOCHE OR COMPREHENSION. When the whole is put for a part, or a part for the whole; a genus for a species, or a species for a genus; in general, when any thing less, or any thing more, is put for the precise object meant, the figure is called a Synecdoche.
Thus, "A fleet of twenty sail, instead of, ships." "The horse is a noble animal;" "The dog is a faithful creature:" here an individual is put for the species. We sometimes use the "head" for the person, and the "waves" for the sea. In like manner, an attribute may be pat for a subject; as "Youth" for the young, the "deep" for the sea.