"Jesus was the firstborn"
"Firstborn" refers only to the male. The first son, even when preceded by four older sisters, is still the "firstborn"
Firstborn has nothing at all to due with the number of children.
A common error among those who think the Bible was written in 20th century English.
You missed the point of the post.
Oh it isn't the "firstborn" issue I am focused on. The arguement I am having with some Catholics is over the claim that after having had Jesus, Mary had no further children and remained sexless with Joseph and remained immaculate, having no sin. They base this in part on a claim that the original Aramaic texts such as Mark chapter6, which describe
the brothers and sisters of Christ in the Greek and other translations subsequent to the Aaramaic... really meant "cousins" or near kin...since in the Aaramaic the word for siblings and cousins is interchangeable. Nevermind, that first century translators knew the languages better than we did, and would have known all about how to make those distinction...having a better understanding of the contextual uses of the languages at the time...Church tradition painted Mary as being for-ever Asexual, how could the Holy womb from which Jesus sprang be violated by having married sex with the subsequent conception of other sin prone children...unless Mark 6 was really speaking of Jesus'
COUSINS....yes that was the ticket...a mistranslation of the Aramaic!!!! And thus the deification of Mary was complete!