This document discusses the concept of visual unity in design. It defines unity as a congruity or agreement among design elements such that they appear to belong together. Unity can be achieved through proximity, repetition, and continuation of shapes, lines, colors etc. Variety within a design is also important to avoid monotony. Examples from artworks demonstrate how unity with some variation creates a more interesting visual pattern than either concept alone. The Gestalt principles of similarity, closure and continuation help explain how the eye perceives grouped elements as unified wholes.