"We have diligently considered the authorities and reasons that have been presented before this holy Council for many years in public relations on both sides, and having seen many others on this same point, and having weighed them with mature consideration; we define and declare that doctrine which says that the glorious Virgin Mother of God, Mary, by a singular grace of the divine Spirit, never succumbed to original sin, but was always immune from all original and actual sin, and was holy and immaculate,be a pious doctrine and in accordance with ecclesiastical worship, the Catholic faith, right reason and Holy Scripture; and therefore must be approved, held and embraced by all Catholics; and it shall no longer be lawful for anyone to preach or teach to the contrary: furthermore, renewing the institution of celebrating her holy Conception, which is celebrated in both the Roman Church and other Churches on 8 December according to ancient and praiseworthy custom, we decree and order that this same celebration be held on the aforementioned day in all Churches, monasteries and convents of Christendom under the name of the Conception."