Christian denominations have differing views on the mediator between them and God. For example, Catholics teach that Christians must go through their priesthood to have a relationship with God. Others teach that one can only have a relationship with God through their particular denomination, or church. Some have even thought, or taught that a relationship with God was only possible through one particular pastor.
This idea was developed with the group today known as Jehovah’s Witnesses starting in the 1890’s around their Founder, Pastor C. T. Russell. He became known among them as “the faithful and wise servant” (Mt 24:45 KJV), “the one that God was using to give true spiritual food to mankind.”
About 10 years after his death in 1916, they changed the “faithful and wise servant” definition to be a class of people, “all of the remaining few on earth that God had specially called to heavenly life.” In reality, however, the one who had gotten control of their organization was their second President, J. F. Rutherford. This concept that the Jehovah’s Witnesses perpetrated is based on turning Mat 24:45-51 into a prophecy, rather than the correct understanding that it is teaching that each individual Christian is to be constantly faithful at all times, unconcerned about the exact date of Christ’s return. The JW organization has changed the definition of exactly who this “servant” or “slave” several times the years. Today they say the “faithful and discreet slave” is their governing body of 7-12 men. In their April 2018 Watchtower study edition article “Questions from Readers,” they continue to make the unscriptural claim that “the one true source of spiritual food” is “the faithful and discreet slave”, their governing body. This is despite numerous changes due to their admitting that their previous understandings were wrong, and their mostly unadmitted numerous prophetic failures, which they have spun into success stories (Dt 18:22). The JW organization has arrogated unto themselves a prophetic mantle, which they now deny, in fulfillment of Zechariah 13:6. They definitely fit the definition of “false prophet” (Dt 18:22; Mt 24:11, 24).
The Bible says “there is one God and one mediator between God and mankind, the man, Christ Jesus (1 Tim 2:5 NIV). Jesus also says that “I am the way the truth and the life. No one comes to the Father except through me” (Jn 14:6 NIV). There is no other mediator, or go-between.
The JW’s, Catholics, and others have usurped the role of Jesus as the only Mediator.
If that weren’t enough, they claim to be “the one true source of spiritual food,” even replacing God, who is the real source “of every good and perfect gift” (Jas 1:17 NIV). The JW’s also deny that there are any other sources of “true spiritual food,” except them. So, JW’s are told that information from all other sources is “contaminated,” suspect. But any other religious commentaries, even if Christian, is “worldly” and dangerous. JW’s are told to avoid it like a plague. Christians should “be as shrewd as snakes and harmless as doves” (Mt 10:16 NLT) to be sure! But, just as all information that the JW’s have published over the years has not been pure, information from all other sources is not contaminated either.
We should always keep in mind that Jesus Christ is “the one mediator between God and mankind” (1 Tim 2:5 NIV), and no individual human or organization has any business standing in his place as a go-between humans and God. Any and all claims to such an effect are obviously false on the face of it.