I don't know much about the church of which he speaks (eastern orthodox?) (and I don't mean to be offensive but just to make a comment), but the title is scary... and borders on profane. The closest thing to a "holy mother" that I have would be the Holy Spirit who birthed me into the kingdom.
When I say "Holy Mother Church", I refer to the Undivided Church before 1054 AD. But nevertheless, BOTH the Roman Church and the Orthodox Church maintain the sacraments and the unbroken line from Christ to the present.