New Defender's Study Bible Notes
3:15 whole family. The “whole family” can also be translated as “every family.” That is, each human family is authorized and identified in terms of the eternal Father who ordained and established the family as the basic unit of human society. The term may also be understood as embracing the uniting of Jews and Gentiles in Christ (Ephesians 2:18-19).
3:16 he. The prayer offered by Paul in Ephesians 3:16-19 is addressed to the Father (Ephesians 3:14) and concerns the indwelling of Christ by faith (Ephesians 3:17) and inner strengthening by the Holy Spirit (Ephesians 3:16). Thus all three Persons of the Godhead dwell in the heart of the believer (see also John 14:16-17,23), so that we can “be filled with all the fulness of God” (Ephesians 3:19).
3:16 strengthened. “Strengthened” in this verse is the same as “able” (or, better, “fully able”) in Ephesians 3:18.
3:18 breadth. The love of Christ is thus four-dimensional, with “depth” and height” considered as separate dimensions. Since the height of the universe is infinite (Isaiah 55:9), this suggests the time dimension too. “Yea, I have loved thee with an everlasting love,” God says, “therefore with lovingkindness have I drawn thee” (Jeremiah 31:3).