Interesting. When I read this, the following thought popped into my mind: If Christ had to have impure progenitors in order to be sinless, then by reasoning, Mary is better than Christ because she could overcome having an impure lineage. Therefore, she must be "better" that Christ Jesus. Egads - blasphemy!
By RC reasoning (that Jesus had to have some help in coming from a sinless mother), either all of Mary's ancestors had to be sinless, or Mary is greater than Jesus.
What? This doesn't make any sense. Christ is sinless because He is divine.
It has nothing to do with having "impure progenitors" and even if it did how would impurity lead to sinlessness?
Did you miss a double negative somewhere?
then by reasoning,
Ahem
Mary is better than Christ because she could overcome having an impure lineage.
Mary didn't "overcome" anything. She was gifted by God through the graces available from the one Sacrifice of Christ on the Cross.
By RC reasoning (that Jesus had to have some help in coming from a sinless mother)
Please, I beg you, do not go around making claims about what Catholics believe. You are confused and are not anywhere near presenting what it is we profess.
Educate yourself.
Jesus didn't need help and we don't teach that He "needed" to have a sinless mother in order for Him to be sinless.
You are simply wrong about what we believe.
Well, how does "the grandmother of God" sound? And in Mormonic doctrine i think they talk about a heavenly mother.