WE think in pictures. Each idea which is presented to the mind forms a picture. Thus, if I say, "I hear a robin singing," a picture of a redbreast on the branch of a tree, with his throat swelling with song, will probably form in your mind. Or if I should say, "The sea is blue to-day," a vision of a wide expanse of blue water, with white-capped waves shimmering in the sunshine, will appear to you. Why is this? We saw in chapter first that it was not so in the beginning; our ability to form mental pictures is due to what is called "association "--object with sound, sound with object, etc.--and that the wider our sense-experience, The musician hears the cadences of his symphony before he has written a line of the score, and did not Columbus have imagination? And Watts, Bell, Darwin, and Marconi? In fact, starting with the savage who naturally and appropriately exprest his thoughts in "picture-writing," the civilization of to-day has become what it is largely Now, one of two things will happen: If you are in the habit of controlling yourself, acting upon reason rather than impulse, you will stop and investigate. If not, your imagination will swamp your reason, and you will believe "snake," scream, and run. Or again: Suppose that you array yourself in your finest raiment with a view to attending some social function at which you wish to look your best. Before leaving home, you survey yourself in the mirror Immediately you shrink in your own estimation. The mental picture which you have formed of yourself changes color and shape. You no longer see yourself as well-drest, but as shabbily and inartistically arrayed. Now, suppose that a man forms a mental ideal of himself as fortunate, successful, popular, happy, and well. The mental state which results colors the mental energy and this spreading out over the body creates chemical changes. And thus we have the phenomenon of correspondence. We see it in the expression of the face, voice,THE IMAGINATION