Lactantius (Divine Institutes IV.14)

This quote is taken from Lactantius' Divine Institutes IV.14. Lactantius was a 4th-century apologist and historian who lived circa the First Ecumenical Council of Nicaea (325 CE). He writes:

"These are the ways of God, in which He enjoined Him
[Jesus] to walk. These are the precepts which He
ordered to be observed. But He exhibited faith towards
God. For He taught that there is but one God, and that
He alone ought to be worshipped. Nor did He at any
time say that He Himself was God; for He would not
have maintained His faithfulness, if, when sent to
abolish the false gods, and to assert the existence of
the one God, He had introduced another besides that
one. This would have been not to proclaim one God, nor
to do the work of Him who sent Him, but to discharge a
peculiar office for Himself, and to separate Himself
from Him whom He came to reveal. On which account,
because He was so faithful, because He arrogated
nothing at all to Himself, that He might fulfil the
commands of Him who sent Him, He received the dignity
of everlasting Priest, and the honour of supreme King,
and the authority of Judge, and the name of God."