Not all Fathers are recognized or well known and Hilary is one such Father. He defended Athanasius when he was exiled and earned the same punishment himself, but managed to write the work from which this quote comes.
Thus my mind, full of these results which were attained by its own reflection and the teaching of Scripture, rested with assurance as on some peaceful watch-tower, upon that glorious conclusion, recognizing that its true nature made it capable of homage to its one Creator, and of none other, whether greater or less; homage namely of conviction that His is a greatness too vast for our comprehension but not for our faith. For a reasonable faith is akin to reason and accepts its aid, even though that same reason cannot cope with the vastness of Eternal Omnipotence.
-- On the Trinity, 8