What does a friend is a second self mean?

The phrase "a friend is a second self" suggests that a true friend reflects aspects of our own identity, thoughts, and emotions. It implies a deep connection where friends understand and empathize with each other, almost as if they share the same mind or spirit. This bond allows for mutual support, understanding, and companionship, enhancing our sense of self through shared experiences and values. In essence, a friend mirrors our inner self, enriching our lives and helping us grow.