1 Our reply, in the previous books, to the mad and blasphemous doctrines of the heretics has led us with open eyes into the difficulty that our readers incur an equal danger whether we refute our opponents, or whether we forbear. For while unbelief with boisterous irreverence was thrusting upon us the unity of God, a unity which devout and reasonable faith cannot deny, the scrupulous soul was caught in the dilemma that, whether it asserted or denied the proposition, the danger of blasphemy was equally incurred.
To human logic it may seem ridiculous and irrational to say that it can be impious to assert, and impious to deny, the same doctrine, since what it is godly to maintain it must be godless to dispute; if it serve a good purpose to demolish a statement, it may seem folly to dream that good can come from supporting it. But human logic is fallacy in the presence of the counsels of God, and folly when it would cope with the wisdom of heaven; its thoughts are fettered by its limitations, its philosophy confined by the feebleness of natural reason.
It must be foolish in its own eyes before it can be wise unto God; that is, it must learn the poverty of its own faculties and seek after Divine wisdom. It must become wise, not by the standard of human philosophy, but of that which mounts to God, before it can enter into His wisdom, and its eyes be opened to the folly of the world. The heretics have ingeniously contrived that this folly, which passes for wisdom, shall be their engine. They employ the confession of One God, for which they appeal to the witness of the Law and the Gospels in the words, Hear, O Israel, the Lord your God is One. They are well aware of the risks involved, whether their assertion be met by contradiction or passed over in silence; and, whichever happens, they see an opening to promote their heresy.
If sacred truth, pressed with a blasphemous intent, be met by silence, that silence is construed as consent; as a confession that, because God is One, therefore His Son is not God, and God abides in eternal solitude. If, on the other hand, the heresy involved in their bold argument be met by contradiction, this opposition is branded as a departure from the true Gospel faith, which states in precise terms the unity of God, or else they cast in the opponent's teeth that he has fallen into the contrary heresy, which allows but one Person of Father and of Son. Such is the deadly artifice, wearing the aspect of an attractive innocence, which the world's wisdom, which is folly with God, has forged to beguile us in this first article of their faith, which we can neither confess nor deny without risk of blasphemy.
We walk between dangers on either hand; the unity of God may force us into a denial of the Godhead of His Son, or, if we confess that the Father is God and the Son is God, we may be driven into the heresy of interpreting the unity of Father and of Son in the Sabellian sense. Thus their device of insisting upon the One God would either shut out the Second Person from the Godhead, or destroy the Unity by admitting Him as a second God, or else make the unity merely nominal. For unity, they would plead, excludes a Second; the existence of a Second is destructive of unity; and Two cannot be One.
Source: On the Trinity (New Advent)