Our brain tends to fill in missing information and ignore gaps to create familiar shapes and images.
Objects that are similar in shape, size or color are perceived as being grouped together or related.
In its simplest form, the figure is often the element that appears to be placed in front of the ground, which can be interpreted as the background.
Depending on which part of this image is perceived as figure, either a vase or the silhouette of two faces can be seen.
The eye is being guided through the square, towards the circle. Our eyes naturally follow the lines of the image.
The law of continuity can also be used to bind two different colors together with the help of a continuous element.
Designs with symmetry help create balance and are easier on the eyes.
Using symmetry in text can also greatly improve readability and the overall aesthetic of the text.