Those of you who wisely keep an eye on the St Lawrence Press ORDO will have noticed that today is among a small number of Sundays upon which 'QV' is to be said.
"The most simple and sublime, the most devotional formulary to which Christianity has given birth".
That is how Blessed John Henry Newman, with his superb gift for lapidary precision, described the 'Athanasian Creed'. Since the Holy See saw fit to give Newman to the English Ordinariate as a Patron, I feel that this superbly credal canticle ought to be in the forefront of the mission of the Ordinariate to repair the lacunae in the day-by-day teaching of the modern Catholic Church; and it certainly ought to be recited regularly in the Divine Office.
Newman often sprang to the defence of this Creed, and our Tractarian Fathers (and their successors during the Prayer Book controversies of 1927-8) fought for its retention in Anglican worship. The most recent occasion upon which I felt a great temptation myself to spring to the defence of the Quicunque vult was during one of the less good lectures during our 'formation'. A lecturer told us this anecdote: one of his regular students had found, on the the EWTN website, the teaching that Christ is "equal to the Father, as touching his Godhead; and inferior to the Father as touching his Manhood." He had felt it necessary to explain to his students that this was heretical, and had encouraged them to write to EWTN and explain that they were promoting heresy (he actually used this unfashionable term). Looking meaningfully at us, with a nod and a wink, he regretted that none of his students had yet done so.
During that 'formation', I maintained a principle of not offering corrections of howlers promoted by the lecturers, lest (mirabile dictu) I should appear to be a troublemaker. But I felt obliged to enter into an email correspondence with the joker concerned, pointing out that this 'heresy' was not only in the Athanasian Creed, but in the Tome of S Leo (and hence inter acta Concilii Chalcedoniensis). It is present in S Augustine and I tracked it down in most of the Latin Fathers. Eventually, very grudgingly, he made some sort of vague retraction (but, of course, not publicly).
S Pius V's Breviary anticipated this Creed being said at the Divine Office on most Sundays; although, in effect, by the twentieth century, it was very rarely said because a commemoratio 'excused' its omission from Prime. The Book of Common Prayer prescribed its use a dozen times a year. During the aetas Bugniniana it was eventually dislodged from its last Catholic toehold, Trinity Sunday.
S Pius V, and Thomas Cranmer, were dead right in this consensus. And, today, the 'Athanasian Creed' is as necessary as ever it was. Trinitarian errors still abound, and many of our present woes arise from faulty beliefs with regard to Catholic teaching about the Trinity and the Hypostatic Union. Dorothy Sayers, a major part of our Anglican theological Patrimony but sadly almost forgotten even among those who should know better, wrote immensely well about this in her The Mind of the Maker (especially Chapter 10; it's on the Internet).