Right. The heretics St. Alphonsus is describing are aware of the sacraments, since "they hold . . . that the sacraments only serve to excite and nourish this faith." To be aware of the sacraments and say they are not necessary nonetheless is what is heretical, not to say that there may be exceptions where the sacraments are unknown to the individual.
While I disagree with "implicit faith" myself, based upon a reading of the wording of Trent (which I take as requiring explicit desire for baptism), I recognize the argument regarding implicit faith being made as not denying sacramental necessity, and that the argument is not heretical.
I'll cite the language I am referring to from Trent later God willing - regarding not violating the canon by acknowledging explicit faith, though I think (which is just opinion, not Church teaching), that the language of Session VI, Chapter 4 requires (logically) at least explicit faith in the sacrament.
Thank you for your rational and informative reply!
I know that St. Alphonsus (in his moral theology) affirms with St. Thomas Aquinas that explicit Faith in the mysteries of Holy Trinity, Incarnation and Redemption are absolutely necessary for salvation. Hence, both will say that God would send an angel to a pagan with good dispositions if necessary. Indeed, we see that Venerable Mary of Agreda was sent by God through bilocation, to evangelize pagan Indians who were of better dispositions than other tribes.
Therefore, in the passage I showed above, if we take into consideration what he wrote elsewhere, I believe he is simply remarking that to love God above all things necessarily includes a willingness to obey all of His commandments, and that such a person would be enlightened as to the necessary mysteries of Faith in reward for their good dispositions. Because the essence of charity consists in willing the good of the other, not in knowing what all of those goods are at all times. God reveals these things to us little by little.
People seem to confuse Faith in Christ with baptism. The former is about believing, the latter is about doing; the law of baptism is a commandment, much like a commandment of the Church. It reminds me of the law of fasting, which is also a commandment of the Church. The law of penance is always binding, but how that law manifests is not always the same for every person, on account of various circuмstances.
Water and a person to baptize is not always available, yet the law of penance (the washing of sins being the effect of baptism) is always there, so it is a moot point for people to keep saying that BOD and BOB are somehow dispensations from the law of baptism. As I have said and will keep saying, hopefully it will resonate with people one day, is that God takes the will for the deed when the deed is impossible.