Visualizing or visualization, forming images in the mind’s eye, is a process of actively creating a picture in your mind and giving it energy. Imagining something is essentially the same as perceiving it in the external world (e.g., picturing sucking a lemon has a direct effect on salivary glands). (Graham, Helen. Discover Color Therapy, p. 45-46. CA: Ulysses Press, 1998.)

Visualization is the process of attempting to instruct the body directly in healing by imagining and picturing internally (e.g., scrub out clogged arteries using brushes, see sharks eating cancer cells). Imagery is different from visualization. Imagery is less an attempt to “perceive” and more to create thoughts and generate feelings of warmth, caring, love, and being healthy. (Pearsall, Paul, PhD. The Heart’s Code, p154-155. NY: Random House, Inc., 1998.)

Imagination is another word for mental planning, or visualizing. Each cortical area creates predictions that are sent back down the hierarchy. To picture (imagine, visualize) something you turn your predictions around so they become inputs. If you close your eyes and imagine a hippopotamus, your visual cortex will become active, just as it would if you were actually looking t a hippo. Athletes may improve their performance by imagining and rehearsing the racecourse over and over in their head. (Hawkins, Jeff, with Sandra Blakeslee. On Intelligence, 200-201NY: Owl Books, 2004.)