As humans, we seek patterns and consistency in our interactions. As a result, we all naturally operate from some sort of system for understanding people. We generalize, explain, and predict our own and others’ behaviour based on our perceptions, experiences, and beliefs. When things don’t fit with those systems or expected patterns, we become unsettled.
We mirror the people around us all the time, even though most of the time we are completely unaware that we are. It is a fundamental aspect to how we learn. You could even say that it’s the most effortless way of learning because it’s what our brain does unconsciously.