There is an old post on this, that didn’t get resolved, as far as I can tell.
Cardinal Newman quotes one Cardinal Gousset having quoted the Fourth Lateran Council thus: “Quidquid fit contra conscientiam, ædificat ad gehennam” (p. 247). Newman himself, it seems, provides a (rather loose?) translation: “He who acts against his conscience loses his soul” (p. 259).
The quotations provided in these passages from Newman are very widely quoted on Catholic websites. I am unable, however, to verify the genuineness of the teaching from Lateran IV. Can anybody do so? Or debunk it?
Newman was, of course, a very careful and cautious writer: I have no doubt that he is quoting Gousset accurately. The question remains, however, whether Cardinal Gousset was quoting the Fourth Lateran Council accurately; he himself was, I gather, a respected scholar, too. But I believe that there have been disputes in the past about (1) which Lateran councils were ecumenical, and (2) which texts attributed to those councils are genuine. So, Gousset could be citing a council that is not now considered to be ecumenical, or a text that is not now considered to be genuine.
I can find no citations to the Fourth Lateran Council on conscience in the Catechism of the Catholic Church or in Vatican II (where I would, indeed, expect to find them). The only use of the word “conscience” I can find (at IntraText) in any of the Lateran councils are all from Lateran V, and none are the quotation in question. Neither Tanner’s edition of the Ecumenical Councils, nor the new Denzinger, cite Lateran IV in their indices for conscience, unless I am overlooking something.
Can anybody else verify, or falsify, this alleged quotation from Lateran Council IV?
Thanks & God bless.