Prajnaparamita: Mother of Wisdom

The Prajnaparamita, the perfection of profound cognition, is also a part of the feminine principle. It is said to be the "womb of the Tathagatas" (the Buddhas, those who have gone beyond) or the "Mother of the Buddhas." The Prajnaparamita is the quality of sharp perception which comes with the relaxation of the ego. Meditation, because it slows down the confused grasping aspect of that mind, allows the natural luminous clarity of the mind, prajna, to come forth. This faculty of profound cognition is the source of, or the womb for, Buddhas to grow in and is therefore called "the womb of the Buddhas."

from "Woman of Wisdom" a book by Tsultrim Allione