Definition: The koan is a Buddhist text that prompts questions to help one find enlightenment, often found in Mahayana Buddhism. The first koan is "What is enlightenment?" This question aims to reveal the truth of our existence and reality. The second koan asks, "What can I know about what is known?" In this case, it leads to self-knowledge or insight into one's inner world. The third koan, often found at the end of the text, states, "Why do we seek enlightenment?" This prompts a search for the purpose and ultimate goal. These questions are meant to awaken the mind to its true nature and reveal the path to spiritual realization.