Prajna-Paramita-Hrdaya-Sutra — The Heart Sutra — is a pivotal Sutra of Mahayana Buddhism.
The Heart Sutra summarizes the essence of the Prajna Paramita (Perfection of Wisdom) teachings of the Buddha. It is a luminous expression of enlightened wisdom realizing emptiness. Many Buddhists around the world recite this daily to plant the imprints towards achieving the highest wisdom.
– Khenchen Tsewang Gyatso Rinpoche