c. 360
Greek
The Apology
Eunomius of Cyzicus · c. 325 – c. 395
A tight, almost geometric argument that God's essence is unbegottenness; that the Son, being begotten, is therefore of a different essence; and — most provocative of all — that the human mind can know God's essence as well as God knows it, since a name given rightly reaches the thing itself.