Calvin on the Blessed Trinity

The more things change, the more they stay the same. Calvin had to face those who employed faux piety to denounce the Trinity by objecting to words not found in the Bible (a term, I like to point out to them, not found in the Scriptures).

"Now, although the heretics rail at the word 'person,' or certain squeamish men cry out against admitting a term fashioned by the human mind, they cannot shake our conviction that three are spoken of, each of which is entirely God, yet that there is not more than one God. What wickedness, then, it is to disapprove of words that explain nothing else than what is attested and sealed by Scripture!
". . . we ought to seek from Scripture a sure rule for both thinking and speaking, to which both the thoughts of our minds and the words of our mouths should be conformed. But what prevents us from explaining in clearer words those matters in Scripture which perplex and hinder our understanding, yet which conscientiously and faithfully serve the truth of Scripture itself, and are made use of sparingly and modestly and on due occasion? There are quite enough examples of this sort of thing. What is to be said, moreover, when it has been proved that the church is utterly compelled to make use of the words 'Trinity' and 'Persons'? If anyone, then, finds fault with the novelty of the words, does he not deserve to be judged as bearing the light of truth unworthily, since he is finding fault only with what renders the truth plain and clear?"
Institutes, 1.13.3