[RFC_Gal]

They don't?

Then why is their a 'concern' about kneeling being a grave (mortal?) sin in some Catholic churches on, I think, the west cost?

I can give other examples from other denominations if they are needed.

[Conservative til I die]

They don't? Then why is their a 'concern' about kneeling being a grave (mortal?) sin in some Catholic churches on, I think, the west cost?

Disobedience? If the Magisterium teaches something and some churches disagree with/disobey that teaching, does that mean the teaching or the authority of the Magisterium is flawed?

[Mrs. Don-o]

Neither the Bible nor the Magisterium (official teaching authority) of the Church says that kneeling at this or that part of the Mass is a mortal sin. If some dingbat clergyman says so--- (sigh) --- he is not thinking with the Church.

As for other denominations: some of them are quite faithful on the important points, and many have members who are living lives of holiness: they have my respect. But as for "teaching authority" ---hey, they've got no guarantees. They're on their own.