The Syllabus of Errors is the name given to an index document issued by the Holy See under Pope Pius IX on 8 December 1864 at the same time as his encyclical letterQuanta cura.[1] It collected a total of 80 propositions that the Pope considered to be current errors or heresies, pairing the briefest headings with references to the various documents where the actual teachings are found.
A cover letter by Cardinal Antonelli notes that Pope Pius IX had ordered the creation of the list, in case some Bishops had not read all his recent allocutions, speeches or encyclicals.[3]
The Syllabus is made up of phrases and paraphrases from earlier papal documents, along with index references to them, presenting a list of "condemned propositions". The Syllabus does not explain why each particular proposition is wrong, but cites the earlier document considering each subject.
The Syllabus is divided into ten sections on the following topics:
no one can now become [Rome's] convert without renouncing his moral and mental freedom, and placing his civil loyalty and duty at the mercy of another.
Catholics
Catholic apologists such as Félix Dupanloup and John Henry Newman said that the Syllabus was widely misinterpreted by readers who did not have access to, or did not bother to check, the original documents of which it was a summary. The propositions listed had been condemned as erroneous opinions in the sense and context in which they originally occurred; without the original context, the document appeared to condemn a larger range of ideas than it actually did. Thus, it was asserted that no critical response to the Syllabus could be valid, if it did not take into account the cited documents and their context.[3] Newman wrote:
The Syllabus then has no dogmatic force; it addresses us, not in its separate portions, but as a whole, and is to be received from the Pope by an act of obedience, not of faith, that obedience being shown by having recourse to the original and authoritative documents, (Allocutions and the like,) to which the Syllabus pointedly refers. Moreover, when we turn to those documents, which are authoritative, we find the Syllabus cannot even be called an echo of the Apostolic Voice; for, in matters in which wording is so important, it is not an exact transcript of the words of the Pope, in its account of the errors condemned, just as would be natural in what is an index for reference.[4]
As the English Catholic historian E. E. Y. Hales explained, concerning item #77:
"[T]he Pope is not concerned with a universal principle, but with the position in a particular state at a particular date. He is expressing his 'wonder and distress' (no more) that in a Catholic country (Spain) it should be proposed to disestablish the Church and to place any and every religion upon a precisely equal footing. [...] Disestablishment and toleration were far from the normal practice of the day, whether in Protestant or in Catholic states."[5]
Newman points out that this item refers to the 26 July 1855 allocution Nemo vestrum. At this time, Spain had been in violation of its Concordat of 1851 with the Holy See (implemented 1855).[6][7]
In 1907, Lamentabili sane exitu was promulgated, a "Syllabus condemning the errors of the Modernists", being a list of errors made by Progressive scholars of biblical criticism.[8]