Four Empowerments of the Great Perfection. These are the outer empowerment of conceptual elaboration {phyi spros bcas kyi dbang} the inner empowerment which is free from conceptual elaboration {nang spros bral gi dbang} the secret empowerment that is very unelaborate {gsang ba shin tu spros bral gi dbang} and the most secret empowerment which is extremely unelaborate {gsang chen rab tu spros bral gi dbang}