A focused look at the elements of composition in traditional visual art (i.e. framed* works, whatever the media, and freestanding sculpture) and architecture. In contrast to his weighty tome "Art & Visual Perception," which covers composition, shapes, colors, relationships between depicted objects in a work, this much shorter book addresses only two concepts in composition--centricity and eccentricity. Centricity describes the idea that any frame contains a center that is undeniable and will be sensed as important. Eccentricity has nothing to do with oddity, but rather the use of vectors that move across, around and from the center to provide a dynamic sense in the use of the space within the shape of the frame. He uses plentiful examples from existing works to show these concepts, and to distinguish between their use on the frontal plane of the picture vs. their use in the creation of depth-space (or lack of it) in representational work. The book helps in understanding how different those two things are, and how the work of art resides in the former not only the latter (along with the fact the work is made of paint, whatever it represents).
Arnheim believes that there is a physical basis for the longstanding use of these concepts in visual art, that has to do with how the human mind receives information from the retina and processes it in the neural networks of the brain. In some other works, he goes into much more detail about the psychological testing of children (and even animals) that shows how these concepts and others around color and the like develop from how humans see and experience visual and spatial reality. Ultimately I believe it is his point that the majority of humans have a common visual and spatial experience of the world that allows us to find common ground as humans through the experience of making and looking at art, and that means art has a critical role in making and keeping us human. He says, (p. 217) "My work is based on the conviction that one of the most necessary human occupations is the creation of objects or performances whose visual structure elucidates and interprets human experiences by its directly perceived expression."
He concludes this book with a brief and touching view of the question of whether artists consciously make use of principles of composition or if, instead, they compose intuitively, through some basic human understanding of how to create an ordered world, within the frame, that appeals to humans due to the order in the brain. He says this all a lot more eloquently than I do. He thinks that people educated in composition are most likely to do both (I agree with him) but that the "miracle" occurs when the two approaches are spontaneously one. I know from experience that looking at art refines one's sense of how to make a picture "work," and it doesn't hurt to think about how the work functions after it's made, when you are making it yourself, but it is not unlike poetry. The poet is a person with a poetic "soul," who sees the world poetically, and a visual artist is a person who for whatever reason has a sensitivity to the way things look and fit together. I think part of the joy of life for the artist is making that happen in the space of a frame in order to draw intentioned and considered attention to the possibilities. That's what the frame is for--to say, stop here, look at this.
---
* while Arnheim does discuss "picture frames," the use of the word frame has to do with the defined shape of the medium on which the work of art is created. For much of Western art, of course, for centuries that has been mainly a rectangle -- but he treats also the tondo (round) shape, sculpture and the scroll of Asian tradition as well. The dominance of the rectangle, well, he has his reasons for that as well, but you'll have to read the book to get into that!!