[De articulis fidei]

...who say that those things which have been universally established by the Church of God are not to be observed. Just as the Arians, who say that established fasts are not to be celebrated solemnly, but that one should fast whenever one wishes, lest one appear to be under the law. And just as the tetraskai-dekaditai those who celebrate on the fourteenth day/Quartodecimans, who say that Easter is to be celebrated on the fourteenth day of the moon, on whatever day of the week it occurs. And the same reason applies to certain other things established by the Church. And against all these errors, it is said in the symbolum apostolorum Apostles' Creed: "The holy catholic Church, the communion of saints, the forgiveness of sins." And in the symbolum patrum Nicene Creed it is said: "Who spoke through the prophets; and one holy, catholic, and apostolic Church. I confess one baptism for the remission of sins."

The fifth article is about the resurrection of the dead, concerning which it is said in 1 Corinthians 15: "We shall all indeed rise again." Against which there are also many errors. The first is the error of Valentinus, who denied the resurrection of the flesh, whom many heretics have also followed. Against whom it is said in 1 Corinthians 15: "If Christ is preached that He rose from the dead, how do some among you say that there is no resurrection of the dead?" The second is the error of Hymenaeus and Philetus. Against whom the Apostle says that they fell away from the truth, saying the resurrection has already happened, either because they did not believe in a resurrection except a spiritual one, or because they did not say that others would rise again except those who rose with Christ. The third is the error of certain modern heretics who say there will be a future resurrection, not however of the same bodies, but that the soul will assume certain celestial bodies. Against whom the Apostle says in 1 Corinthians 15: "For this corruptible must put on incorruption, and this mortal..."