The 1971 book The Nations Shall Know that I am Jehovah" devotes chapter 4 - "Commissioned to Speak in the Divine Name" - to outlining why the Watch Tower Society was chosen in 1919 to "speak as a prophet in the name of Jehovah."
"commissioned to serve as the mouthpiece and active agent of Jehovah … Whom could the real "chariot" of Jehovah's organization roll up to and confront that He might bestow upon this qualified one the commission to speak as a prophet in the name of Jehovah?" The Nations Shall Know that I am Jehovah" - How? pp.59,61
Catholic Catechism #969 “Therefore the Blessed Virgin is invoked in the Church under the titles of Advocate, Helper, Benefactress, and Mediatrix.” Clearly the Catholic Church has lifted titles for the Holy Spirit and applied them to Mary. The title Mediatrix is the feminized version of Jesus‟ title as Mediator. The RCC makes Mary a co-mediator.
Catholic Catechism # 882 The Pope, Bishop of Rome and Peter's successor, "is the perpetual and visible source and foundation of the unity both of the 7 bishops and of the whole company of the faithful. For the Roman Pontiff, by reason of his office as Vicar of Christ, and as pastor of the entire Church has full, supreme, and universal power over the whole Church, a power which he can always exercise unhindered."
Like the Watchtower, the Pope sees himself as the visible head of God’s Kingdom on earth as opposed to the invisible authority of Jesus Christ. However, early Christians walked by faith, not by sight. (2 Cor. 5:7).
Like the RCC teaching that Mary is a Co-Mediator with Christ, Watchtower sees themselves as a similar co-mediator.
One of the Pope’s titles is the Vicar of Christ. The word vicar comes from the Latin word vicarius meaning substitution. The on-line version of the Pocket Catholic Dictionary defines the Vicar of Christ as: “The Pope, visible head of the Church on earth, acting for and in the place of Christ”.
However, this is in serious conflict with scripture. Can there be two heads on one body?
… Christ is the head of the church: and he is the saviour of the body. - Ephesians 5:23
Also like the Catholic Church which claims its traditions and unique teachings are equal to that of the bible, the Watchtower also views its teachings as part of the bible with the same authority:
Watchtower December 15, 2008, pg. 28 – “Our coming to know „the truth‟ - the entire body of Christian teachings that has become part of the Bible - and adhering to it are essential for our salvation”.