59. Since it was taught that the Son did not, like
all other things, owe His existence to God’s will, lest He should
be thought to derive His essence only at His Father’s will and
not in virtue of His own nature, an opportunity seemed thereby to be
given to heretics to attribute to God the Father a necessity of
begetting the Son from Himself, as though He had brought forth the Son
by a law of nature in spite of Himself. But such liability to be
acted upon does not exist in God the Father: in the ineffable and
perfect birth of the Son it was neither mere will that begat Him nor
was the Father’s essence changed or forced at the bidding of a
natural law. Nor was any substance sought for to beget Him, nor
is the nature of the Begetter changed in the Begotten, nor is the
Father’s unique name affected by time. Before all time the
Father, out of the essence of His nature, with a desire that was
subject to no passion, gave to the Son a birth that conveyed the
essence of His nature.