Another thing that can be accomplished by concentration is the following. The mind is a storehouse of all the impressions that one has gathered through the five senses; and the most wonderful phenomenon that one can perceive is that every one of those impressions is at hand as soon as the mind asks it to present itself before one. They instantly come to be used. For instance an artist wants to paint a wonderful picture. He would like it to be a picture of a man, but at the same time an unusual one. As soon as he closes his eyes images of the horns of an animal, of the wings of a bird, and of the body of a fish present themselves, and then he paints a figure with horns, wings, and the body of a fish, combining all into a fabulous whole. Now what would one call this action? This action is an action of the will of the artist, who wanted to produce something wonderful, and the mind was instantly ready to supply from the storehouse all that the artist wished.