How could the intercession of a dead unbeliever help anyone? She certainly didn't help herself by not believing in Christ or God.
Unless Teresa received faith in Christ before she died, she's in no position to help anyone or herself.
It would indeed be a miracle to see any Calvinist display any humility.
What is more humble? To believe, as RCs believe, their own good works and righteousness save them, or to believe, as Protestants believe, that Christ's good work and Christ's righteousness save them?
It’s not very humble to believe, as Calvinists believe, their own birth has saved them no matter what they do, think or say or how they act towards others.
That is the 1 million dollar question..