Contemplate the mind, the king of emptiness; it is subtle and obscure, shapeless and formless, and has wondrous powers. It is able to eradicate countless calamities and to accomplish all merits. It can cause one’s body to do either evil or good. Thus, it is advised to guard and prevent oneself from the instantaneous creation of karmas, which casts one back to the sea of suffering. A pure mind is like gold in this world; the treasure of prajna wisdom is found entirely within the body and mind.
── from Shanhui Dashi Yulu (Records of Great Master Shanhui)