The Argument That Baptism Is Impossible For Some To Receive

OBJECTION-  Baptism of desire supporters assert that for some people the command to be baptized is simply impossible to fulfill.

ANSWER- God does not command impossibilities (de fide).  Thus, it is not impossible for any man to get baptized. 

Catechism of the Council of Trent, On Baptism, Tan Books, p. 171:
"Holy writers are unanimous in saying that after the Resurrection of our Lord, WHEN HE GAVE HIS APOSTLES THE COMMAND to go and teach all nations: baptizing them in the name of the Father, and of the Son, and of the Holy Ghost, THE LAW OF BAPTISM became obligatory on all who were to be saved."

Pope Paul III, Council of Trent, Session 6, Chap. 11 on Justification, ex cathedra: "... no one should make use of that rash statement forbidden under anathema by the Fathers, that the commandments of God are impossible to observe for a man who is justified. ‘FOR GOD DOES NOT COMMAND IMPOSSIBILITIES, but by commanding admonishes you both to do what you can do, and to pray for what you cannot do…’"[1]

Endnotes:

[1] Denzinger 804.