This type of image has great appeal , it makes for “good” shape relationship. Many people automatically gravitate to symmetry. We are symmetrical after all : two eyes, two ears, etc.. Look around at consumer products and graphics to see how many use symmetry. You will find that it is the dominant organizational concept.
Symmetry comes from the Greek: “συμμετρεῖν” = to measure together. Symmetry is balance, and balance means harmony.
This striking video by Everynone plays with our yearning for balance, and reveals how beautiful imperfect matches can be.