A "Sutra" is a concise and structured text that serves as a guide or thread of teachings in various spiritual and philosophical traditions, particularly in Buddhism and Hinduism. These texts often encapsulate complex ideas in a few words, making them easier to remember and study. Sutras can cover a wide range of topics, including ethics, meditation, and the nature of reality. The term "sutra" literally means "thread" in Sanskrit, symbolizing how these teachings connect different concepts and practices. Many famous sutras, such as the Yoga Sutras of Patanjali and the Heart Sutra, have been foundational in shaping spiritual practices and philosophies throughout history.