The Letters of St. Jerome 18To Pope Damasus.

"Some of my predecessors," he writes, "make 'the Lord sitting upon a throne' God the Father, and suppose the seraphim to represent the Son and the Holy Spirit. I do not agree with them, for John expressly tells us that it was Christ and not the Father whom the prophet saw." And again, "The word seraphim means either 'glow' or 'beginning of speech,' and the two seraphim thus stand for the Old and New Testaments. 'Did not our heart burn within us,' said the disciples, 'while he opened to us the Scriptures?' Moreover, the Old Testament is written in Hebrew, and this unquestionably was man's original language." "Whatever," he asserts, "we read in the Old Testament we find also in the Gospel; and what we read in the Gospel is deduced from the Old Testament. There is no discord between them, no disagreement. In both Testaments the Trinity is preached."