Philippians 2:6

Who being in the form [1] of God, (that is truly, properly, and essentially God from eternity, as the ancient Fathers here observed against the Arians) taking the form of a servant, (i.e. taking upon him our human nature) became truly a man, and as man the servant of God, but remaining always God as before, thought it not robbery, no injury to his eternal Father, to be equal, to be esteemed, and to declare himself equal to God, to be one thing with him: as on divers occasions he taught the people, as we have observed in the notes on St. John's gospel, &c. (Witham)

[BIBLIOGRAPHY]

In forma Dei, Greek: en morphe Theou. See St. John Chrysostom (tom. iv. p. 31. 32. Greek: log. 5.) where he shews how many heresies are confuted by these words: and says, Greek: e morphe tou doulou, e phusis doulou....kai e morphe tou Theou, Theou phusis. See St. Gregory of Nyssa...3. cont. Eunom.; St. Augustine, lib. 1. de Trin. chap. 1. &c.