The document discusses key principles of design that are important for understanding abstract art, including dominance, unity, balance, harmony, gradation, and repetition. It explains that dominance gives interest by placing the focal point off-center, unity relates design elements to the idea expressed, and balance offsets large and small or light and dark shapes. Harmony combines similar elements, gradation adds perspective and movement, and repetition with variation engages viewers more than simple repetition. The document challenges readers to find examples applying these principles in their own abstract art and discuss them at their next art show.