A.T. Robertson Commentary Ephesians 2:18

"for through him we both have our access in one Spirit unto the Father." — Ephesians 2:18 (ASV)

Through him (δι' αυτου). Christ.

We both (ο αμφοτερο). "We the both" (Jew and Gentile).

Our access (την προσαγωγην). The approach, the introduction as in Ro 5:2.

In one Spirit (εν εν πνευματ). The Holy Spirit.

Unto the Father (προς τον πατερα). So the Trinity as in 1:13f. The Three Persons all share in the work of redemption.