"2. If someone should want to behold the state of his mind, let him deprive himself of all mental representations, and then he shall behold himself resembling sapphire or the colour of heaven. It is impossible to accomplish this without impassibility, for he will need God to collaborate with him and breathe into him the connatural light."
January 1, 1970
https://en.wikiquote.org/wiki/Evagrius_Ponticus