The principles of art are what happens to the elements when we make images. They are the visual relationships that occur when the elements come together into a work of art. They are not found in isolation. They almost always work together and an artwork will usually use all the principles. It is important to realize that the principles are a way we describe the interactions of the elements. The elements are real and the principles are how we see the relationships. The principles are more subjective. You may or may not see a composition as being well balanced or as having movement.