Proposition # 25: Jesus referred to the Holy Spirit as “another [Gk., allos] Helper.” (John 14:16) . Greek scholar Joseph Thayer states, “Allos generally denotes simply a distinction of individuals.” / “Heteros involves the secondary idea of difference of kind.” Hence, since Jesus is a Person, the Holy Spirit must be One also or Jesus would have used heteros instead of allos at John 14:16.
Response: In John 14:161-8 notice what Jesus said,
“And I will pray the Father, and He will give you another [allos] helper, to be with you forever / I will not leave you desolate; I will come to you.”
At Matthew 28:20 he said, “Lo, I am with you always, to the close of the ages.”
It is through the coming of this promised helper, the holy spirit, that Jesus comes to them and remains with them (although he is physically absent), hence the use of allos. As said before, the holy spirit is reflective of personality, in this case, that of Jesus Christ.
In fact, Thayer’s definition of allos and heteros helps prove that Jesus is not God, nor a second person in the Godhead. Under the Law Covenant the nation of Israel was portrayed as the wife of God, and He, her Husband. (Jeremiah 31:32; Isaiah 54:5-6) Consider what Paul wrote in Romans 7:1-4,
“Do you not know, brethren –for I am speaking to those who know the Law– that the Law is binding on a person only during his life? … Likewise, my brethren, you have died to the Law through the body of Christ, so that you may belong to another [heteros], to him who has been raised from the dead in order that we may bear fruit for God.”
Those spoken of here “died to the Law” –hence, were no longer married to God– so that they might “belong to another [heteros],” namely, Jesus “who has been raised from the dead.” According to the above definitions used by trinitarians, these “brethren” could not “belong to another” person of the Godhead since heteros “involves the secondary idea of difference of kind.”
Paul would have used allos in this passage if Jesus were God or the second person in a triune God.