The Dalai Lama argues that tantric yoga trainees need to realize the emptiness of inherent existence before they can go on to the "highest yoga tantra initiation"; realizing the emptiness of inherent existence of the mind is the "fundamental innate mind of clear light, which is the subtlest level of the mind", where all "energy and mental processes are withdrawn or dissolved", so that all that appears to the mind is "pure emptiness". As well, emptiness is "linked to the creative Void, meaning that it is a state of complete receptivity and perfect enlightenment", the merging of the "ego with its own essence", which Buddhists call the "clear light".