Here is how we know:
http://papastronsay.blogspot.com/2011/10/text-of-letter-prophesied-to-father.html?m=1
Absurd and dangerous.
We KNOW demons have the ability to simulate godliness and fancy of appearing as False Christi or false Mariae.
Padre Pio himself told us he had difficulty in recognising the Devil's deception from the Real Apparitions, and could only do so carefully and slowly.
This is thrice wrong:
-you shouldn't take that website's testimony as valid of the fact and letter even being real
-the Jesuit shouldn't have publicised such a private apparition unbeknownst as to its validity to him personally
-the "lady in odour of sancity" shouldn't have taken what the Spirit told her as true on the surface, especially if it apparently went against Common Church Teaching*
*indirectly, the anecdote shows this, because if BOD for INFIDELS you embrace as true, was a common and accepted teaching, the Father wouldn't have been disconcerted as he was to begin with.
I'm always sceptical about this imaginific alleged intervention of Our Lady where she says absurd things such as:
"this soul is mine; I will it, I claim it as an inheritance" and seemingly order Christ around, as if He would not judge in the most Perfect and Just manner already but needed Mary's intervention to administer it.
And as if Mary's will would be actually and properly in contrast with God, and seemingly allowed to ignore Divine Law as her own whim.
These are sure and tell tale signs of False Apparitions.
Your self-reliance is breathtaking. You do realize the Pope has taught that we MUST adhere to the consensus of theologians, don't you?
Denzingers Sources of Catholic Dogma:
1683 While, in truth, We laud these men with due praise because they professed the truth which necessarily arises from their obligation to the Catholic faith, We wish to persuade Ourselves that they did not wish to confine the obligation, by which Catholic teachers and writers are absolutely bound, only to those decrees which are set forth by the infallible judgment of the Church as dogmas of faith to be believed by all [see n. 1722]. And We persuade Ourselves, also, that they did not wish to declare that that perfect adhesion to revealed truths, which they recognized as absolutely necessary to attain true progress in the sciences and to refute errors, could be obtained if faith and obedience were given only to the dogmas expressly defined by the Church. For, even if it were a matter concerning that subjection which is to be manifested by an act o f divine faith, nevertheless,
it would not have to be limited to those matters which have been defined by express decrees of the ecuмenical Councils, or of the Roman Pontiffs and of this See, but would have to be extended also to those matters which are handed down as divinely revealed by the ordinary teaching power of the whole Church spread throughout the world, and therefore, by universal and common consent are held by Catholic theologians to belong to faith.1684 But, since it is a matter of that subjection by which in conscience all those Catholics are bound who work in the speculative sciences, in order that they may bring new advantages to the Church by their writings, on that account, then, the men of that same convention should recognize that
it is not sufficient for learned Catholics to accept and revere the aforesaid dogmas of the Church, but that it is also necessary to subject themselves to the decisions pertaining to doctrine which are issued by the Pontifical Congregations, and also to those forms of doctrine which are held by the common and constant consent of Catholics as theological truths and conclusions, so certain that opinions opposed to these same forms of doctrine, although they cannot be called heretical, nevertheless deserve some theological censure.
You need to deal with this Desmond. The mentality of "No one defined it, it isn't a dogma!" Is not Catholic. You are obliged to MORE. YOU have to submit to what all the theologians teach as true.
So when all the theologians in the world accept Pope Pius X Catechism as orthodox and it includes BOD in it, this is binding, for it is the teaching not only of all the theologians, but all the bishops of the world in union with the pope, and THAT is infallible.
You are like the black knight in Monty Python being totally de-limbed: "'Tis but a flesh wound!"