IV.
Of Faith and Reason.
1. If any one shall say that in divine revelation there are no mysteries, truly and properly so called, but that all the doctrines of faith can be understood and demonstrated from natural principles, by properly cultivated reason; let him be anathema.
2. If any one shall say that human sciences are to be so freely treated, that their assertions, although opposed to revealed doctrine, are to be held as true, and cannot be condemned by the Church; let him be anathema.
3. If any one shall assert it to be possible that sometimes, according to the progress of science, a sense is to be given to doctrines propounded by the Church different from that which the Church has understood and understands; let him be anathema. Therefore We, fulfilling the duty of our supreme pastoral office, entreat, by the mercies of Jesus Christ, and, by the authority of the same our God and Saviour, We command, all the faithful of Christ, and especially those who are set over others, or are charged with the office of instruction, that they earnestly and diligently apply themselves to ward off, and eliminate, these errors from Holy Church, and to spread the light of pure faith.
And since it is not sufficient to shun heretical pravity, unless those errors also be diligently avoided which more or less nearly approach it, We admonish all men of the further duty of observing those constitutions and decrees by which such erroneous opinions as are not here specifically enumerated, have been proscribed and condemned by this Holy See.
Given at Rome in public Session solemnly held in the Vatican Basilica in the year of our Lord one thousand eight hundred and seventy, on the twenty-fourth day of April, in the twenty-fourth year of our Pontificate.
In conformity with the original.
Joseph, Bishop of S. Polten,
Secretary of the Vatican Council.
