The word image is somewhat ill-chosen; for it usually signifies something connected with the eye, and implies that the stuff of mental images is entirely visual. The true fact of the matter is, we can image practically anything that we can sense. We may have tactual images of things touched; auditory images of things heard; gustatory images of things tasted; olfactory images of things smelled. How these behave in general and how they interact in study will engage our attention in this chapter. The most highly dramatic use of images is in connection with that mental process known as Imagination. As we study the writings of Jack London, Poe, Defoe, Bunyan, we move in a realm almost wholly imaginary. And as we take a cross-section of our minds when thus engaged, we find them filled with images. Furthermore, they are of great variety--images of colors, sounds, tastes, smells, touches, even of sensations from our own internal organs, such as the palpitations of the heart that accompany feelings of pride, indignation, remorse, exaltation. A further characteristic is that they are sharp, clean-cut, vivid. Note in the balcony scene from Romeo and Juliet, the number, variety and vividness of the images: "But, soft! What light through yonder window breaks? It is the east, and Juliet is the sun. Arise, fair sun, and kill the envious moon, Who is already sick and pale with grief That thou, her maid, art far more fair than she. Be not her maid, since she is envious; Her vestal livery is but sick and green.... Two of the fairest stars in all the heaven, Having some business, do entreat her eyes To twinkle in their spheres till they return. What if her eyes were there, they in her head? The brightness in her cheek would shame those stars, As daylight doth a lamp; her eyes in heaven Would through the airy regions stream so bright That birds would sing and think it were not night. See, how she leans her cheek upon her hand! O, that I were a glove upon that hand, That I might touch that cheek!" We may conclude, then, that three of the desirable attributes of great works of the imagination are _number, variety_ and _vividness_ of mental images. One question that frequently arises concerning works of the imagination is, What is their source? Superficial thinkers have loosely answered, "Inspiration," implying, (according to the literal meaning of the word, "to breathe in"), that some mysterious external force (called by the ancients, "A Muse") enters into the mind of the author with a special revelation.