Extract from : Moral Theology, Bk. 6, nn. 95-7.
Concerning Baptism
Baptism, therefore, coming from a Greek word that means ablution or immersion in water, is distinguished into Baptism of water, of desire and of blood.
We shall speak below of Baptism of water, which was very probably instituted before the passion of Christ the Lord, when Christ was baptised by John. But Baptism of desire is perfect conversion to God by contrition or love of God above all things accompanied by an explicit or implicit desire for true Baptism of water, the place of which it takes as to the remission of guilt, but not as to the impression of the character or as to the removal of all debt of punishment. It is called "of wind" because it takes place by the impulse of the Holy Ghost who is called a wind. Now it is de fide that men are also saved by Baptism of desire, by virtue of the Canon Apostolicam, "de presbutero non baptizato" and of the Council of Trent, session 6, Chapter 4 where it is said that no one can be saved "without the laver of regeneration or the desire for it".
If St. Alphonsus believed that Baptism of Desire was *De Fide*, then does that make him a heretic?
St. Alphonsus: “
Baptism of blowing is perfect conversion to God through contrition or through the love of God above all things, with the explicit desire, or implicit desire of the true river of baptism whose place it supplies (iuxta Trid. Sess. 14, c. 4) with respect to the remission of the guilt, but not with respect to the character to be imprinted, nor with respect to the full liability of the punishment to be removed: it is called of blowing because it is made through the impulse of the Holy Spirit, who is called a blowing.” (St. Alphonsus, Moral Theology, Volume V, Book 6, n. 96)
Latin- “Baptismus flaminis est perfecta conversio ad Deum per contritionem, vel amorem Dei super omnia, cuм voto explicito, vel implicito, veri baptismi fluminis, cujus vicem supplet (iuxta Trid. Sess. 14, c. 4) quoad culpae remissionem, non autem quoad characterem imprimendum, nec quoad tollendum omnem reatum poenae: dicitur flaminis, quia fit per impulsum Spiritus Sancti, qui flamen nuncupatur.”Notice the highlighted part, here St Alphonsus teaches that "BOD" does not provide the remission of the punishment due to sin, however, it is de fide dogma that the grace of Baptism, as defined infallibly, does indeed provides full remission of punishment due to sin, :scratchchin: then it follows that the BOD st Alphonsus is talking here, cannot provide the grace of Baptism, let alone salvation, as understood in the Infallible Church teaching. In the quote itself, we find then a denial of the efficacy of "desire" for Baptism.
Trent defines the absolute need to be born again in water and Holy Ghost in order to be justified. This means the removal of every punishment due to sin. There is then a contradiction in St Alphonsus quote since in it, we actually find that the BOD he is speaking of, is not sufficient to obtain this remission of sin, and therefore, justification, first step for Salvation, which is sealed by water Baptism.