Whether they are equals in essence or differ from one another we know not. God, their Creator, Who knoweth all things, alone knoweth. But they differ See Greg. Naz., Orat. 34. And cf. Cyril, Thesaur. 31, p. 266; Epiph., Hæres. 64. from each other in brightness and position, whether it is that their position is dependent on their brightness, or their brightness on their position: and they impart brightness to one another, because they excel one another in rank and nature Dionys., De Cœl. Hier., ch. 3; Greg. Naz., Orat. 34.. And clearly the higher share their brightness and knowledge with the lower.