The Diamond Sutra is a key text in Mahayana Buddhism, known for its teachings on the nature of reality and the concept of emptiness. It is a dialogue between the Buddha and his disciple, Subhuti, focusing on the importance of non-attachment and the impermanence of all things. The sutra emphasizes that true wisdom comes from understanding the illusory nature of the self and phenomena. This text is one of the oldest printed books in existence, dating back to 868 CE. It is part of the larger collection of scriptures known as the Prajnaparamita literature, which explores profound philosophical ideas. The Diamond Sutra has influenced many Buddhist traditions and continues to be studied for its deep insights into enlightenment and compassion.