Adam Clarke on Ephesians 2:18

For through him - Christ Jesus, we both - Jews and Gentiles, have access by one Spirit - through the influence of the Holy Ghost, unto the Father - God Almighty. This text is a plain proof of the holy Trinity. Jews and Gentiles are to be presented unto God the Father; the Spirit of God works in their hearts, and prepares them for this presentation; and Jesus Christ himself introduces them. No soul can have access to God but by Jesus Christ, and he introduces none but such as receive his Holy Spirit. All who receive that Spirit are equally dear to him; and, whatever their names be among men, they are known in heaven as children of God, and heirs of eternal glory.