In other words Centroamerica, (or any other BODer in this thread) why would you think St. Catherine's words on Baptism are infallible, but reject those of St. Gregory nαzιanzen in which he explicitly denies B. of Desire?
Both are Doctors of the Church.
Centroamerica claims that what makes St. Catherine's words infallible, (and therefore true, without the possibility of error) while St. Gregory nαzιanzen's false is that
she said that God told her so. Sorry, but you will not find any theological source which would support such a notion of infallibility. What makes something infallible is only determined by the highest authority of the Church. Private revelations, even by saints, may contain error, because they are fallible.
Pope Pius XII states here that not even the works of the most eminent Doctors constitute the principal source of truth.
The Church has never accepted even the most holy and most eminent Doctors, and does not now accept even a single one of them, as the principal source of truth. The Church certainly considers Thomas and Augustine great Doctors, and she accords them the highest praise; but, by divine mandate, the interpreter and guardian of the Sacred Scriptures and depository of Sacred Tradition living within her, the Church alone is the entrance to salvation, she alone by herself, and under the protection and guidance of the Holy Ghost is the source of truth.
Centroamerica simply chooses to believe in St. Catherine's words on Baptism, while reject St. Gregory's because he has a highly emotional attachment to the distorted version of BOD, as evident by his mental breakdowns on this subject.