The Heart Sutra, also known as "Sutra of the Perfection of Wisdom", was written between the first and sixth centuries. Although the identity of its author is unknown, there is no doubt that this is the best known of all the Sutras, especially in the branches of Mahayana Buddhism. In its lines, the bodhisattva Avalokiteshvara teaches Shariputra, one of the chief disciples of Buddha, the nature of emptiness and the path to enlightenment.

"Feeling, thought and will, and even consciousness, everything is the same. It's all part of emptiness, which is neither born nor destroyed, nor is tainted nor pure, neither increases nor decreases. "