The brain is remarkably complex, and despite the popular myth, we use far more than 10 percent of it throughout our daily lives. Still, the way we interpret images can sometimes reveal interesting aspects of how we think and perceive the world. Optical illusions are especially fascinating because two people can look at the same picture and notice completely different things.

Consider an illustration showing four men sitting in a tree. Choose the person you instinctively believe is the smartest, without overthinking your answer. If you choose Number 1, you may be optimistic and independent, although you should be careful not to become too isolated. Number 2 supposedly represents determination and a strong-willed personality, but being too stubborn could sometimes affect your judgment. Number 3 suggests a logical and cautious thinker who carefully considers decisions, while Number 4 represents someone carefree, adventurous, and willing to go against the crowd.

Another famous example is the young woman/old man illusion. If you immediately notice the back of a young woman’s head, the interpretation suggests that you tend to be optimistic and naturally focus on the positive side of life. You may also have an adventurous and spontaneous personality, making you someone who brings energy and happiness to those around you.

If you instead see the mustached old man looking downward, the interpretation describes you as a thoughtful and critical thinker with strong empathy. Friends may see you as someone they can rely on for advice because you combine logic with compassion. You may also have high standards for yourself and others, but your understanding nature allows you to forgive people when they fall short. Of course, these personality interpretations are meant for entertainment rather than scientific personality assessment—but they can still make for a fun way to think about how we see the world.