The quote "To know others is knowledge; to know oneself is wisdom" is attributed to Lao Tzu, an ancient Chinese philosopher and the reputed author of the Tao Te Ching, a foundational text of Taoism. Lao Tzu's teachings emphasize the importance of self-awareness and understanding, as well as the interconnectedness of all things in the universe. This particular quote underscores the value of introspection and the pursuit of wisdom through knowing oneself deeply.