Patterns are everywhere: both in the wonders of nature and in the man-made world. They exist in the formations of crystals and clouds, in art and music, and in math and science. It is therefore no surprise that we, as inhabitants of this pattern filled world, are wired to find them.
And it's not only humans that have this ability; pattern recognition is a skill shared by all mammals. Since the first primates learned that certain weather patterns meant a storm and others meant it was time to hunt, life on this planet has both created and responded to patterns for survival.