The four forms of wisdom of a Buddha according to the 法相 Dharmalakṣana school: (1) 大圓鏡智 the great mirror wisdom of Akṣobhya; (2) 平等性智 the universal wisdom of Ratnaketu; (3) 妙觀察智 the profound observing wisdom of Amitābha; (4) 成所作智 the perfecting wisdom of Amoghasiddhi. There are various other groups.