The Art of Public Speaking or less consciously invented the unreal on the basis of the real. And just here the fictionist, the poet, and the public speaker will see the value of productive imagery. True, the feet of the idol you build are on the ground, but its head pierces the clouds, it is a son of both earth and heaven. One fact it is important to note here: Imagery is a valuable mental asset in proportion as it is controlled by the higher intellectual power of pure reason. The untutored child of nature thinks largely in images and.