Gladly. The quote you gave is :
"We teach and define that it is a dogma Divinely revealed that the Roman pontiff when he speaks ex cathedra, that is when in discharge of the office of pastor and doctor of all Christians, by virtue of his supreme Apostolic authority, he defines a doctrine regarding faith or morals to be held by the universal Church, by the Divine assistance promised to him in Blessed Peter, is possessed of that infallibility with which the Divine Redeemer willed that his Church should be endowed in defining doctrine regarding faith or morals, and that therefore such definitions of the Roman pontiff are of themselves and not from the consent of the Church irreformable."The first part you bolded says the the doctrine of Papal Infallibility is Divinely Revealed. It does not say that the Pope, when defining doctrine, is receiving new Revelation.
Catholics believe that public Divine Revelation ended with the death of the last Apostle. Therefore, the only thing that the Pope, in exercising his infallibility, has to work with is that said Revelation.
From your comments I take it you are not Catholic. Fine, but your rejection of Catholicism should be a rejection of the real McCoy, not a strawman of your own, or any other Protestant's, making.