After Buddha’s first discourse of Zen, there is only one other discourse he ever gave on the philosophy of it. It’s one of the shortest Buddhist texts. Though there is a longer version of this text too, scholars have considered only the shorter version authentic. Known as Prajna Paramita Hrydyam or Prajna Paramita Sutra, or sometimes just Hridya Sutra or Heart Sutra. In this brief but remarkable text, Buddha imparted wisdom to his most promising and one of his closest disciples: Shariputra.
