Expression, then, is the key to our understanding of the Awesome and the Awful, for it brings objectivity to Aesthetics. It is often said that there is no accounting for taste, and this is true enough; but it is not the whole story. Taste refers to the subjective aspect of our valuations: what a person likes or prefers depends on the persons physical and psychological make-up. But the forces that go to make up things are inherent in the things themselves—they are objective rather than subjective, although they become subjective for us. Different people, however, differ in their awareness of the specific forms of that which is being expressed. And of course, it is well known that education can hinder or even destroy artistic sensitivity; this, according to Arnheim, is what happened in modern society with its public education systems. On the other hand, the right kind of education—say, in the psychology of artistic perception—can actually enhance our artistic sensitivity. This is what Arnheim's books are about, and this is also what makes an acknowledgement of the expression of directed forces a key to understanding Beauty. An enhanced awareness of the forces inherent in a work of art (or any object, for that matter) aids our appreciation of the expression of the work.