[Denzinger 430 - Sources of Catholic Dogma]
LATERAN COUNCIL IV 1215
Ecumenical XII (against the Albigensians, Joachim, Waldensians etc.
The Trinity, Sacraments, Canonical Mission, etc.*
Chap. 1. The Catholic Faith
(Definition directed against the Albigensians and other heretics]
One indeed is the universal Church of the faithful, outside which no one at all is saved, * in which the priest himself is the sacrifice, Jesus Christ, whose body and blood are truly contained in the sacrament of the altar under the species of bread and wine; the bread (changed) into His body by the divine power of transubstantiation, and the wine into the blood, so that to accomplish the mystery of unity we ourselves receive from His (nature) what He Himself received from ours. And surely no one can accomplish this sacrament except a priest who has been rightly ordained according to the keys of the Church which Jesus Christ Himself conceded to the Apostles and to their successors. But the sacrament of baptism (which at the invocation of God and the indivisible Trinity, namely, of the Father and of the Son and of the Holy Spirit, is solemnized in water) rightly conferred by anyone in the form of the Church is useful unto salvation for little ones and for adults. And if, after the reception of baptism, anyone shall have lapsed into sin, through true penance he can always be restored. Moreover, not only virgins and the continent but also married persons pleasing to God through right faith and good work merit to arrive at a blessed eternity.
[Denzinger 693, Sources of Catholic Dogma]
EUGENIUS IV 1431-1447
COUNCIL OF FLORENCE 1438-1445
Ecumenical XVII (Union with the Greeks, Armenians, Jacobites)
Decree for the Greeks *
[From the Bull “Laetentur coeli,” July 6, 1439]
De novissimis] * It has likewise defined, that, if those truly penitent have departed in the love of God, before they have made satisfaction by the worthy fruits of penance for sins of commission and omission, the souls of these are cleansed after death by purgatorial punishments; and so that they may be released from punishments of this kind, the suffrages of the living faithful are of advantage to them, namely, the sacrifices of Masses, prayers, and almsgiving, and other works of piety, which are customarily performed by the faithful for other faithful according to the institutions of the Church. And that the souls of those, who after the reception of baptism have incurred no stain of sin at all, and also those, who after the contraction of the stain of sin whether in their bodies, or when released from the same bodies, as we have said before, are purged, are immediately received into heaven, and see clearly the one and triune God Himself just as He is, yet according to the diversity of merits, one more perfectly than another. Moreover, the souls of those who depart in actual mortal sin or in original sin only, descend immediately into hell but to undergo punishments of different kinds [see n.464].