Passage
May be able to comprehend with all saints what is the breadth, and length, and depth, and height;
May be able to comprehend with all saints what is the breadth, and length, and depth, and height;
Ephesians 3:16 That he would grant you, according to the riches of his glory, to be strengthened with might by his Spirit in the inner man;
Ephesians 3:17 That Christ may dwell in your hearts by faith; that ye, being rooted and grounded in love,
Ephesians 3:18 May be able to comprehend with all saints what is the breadth, and length, and depth, and height;
Ephesians 3:19 And to know the love of Christ, which passeth knowledge, that ye might be filled with all the fulness of God.
Ephesians 3:20 Now unto him that is able to do exceeding abundantly above all that we ask or think, according to the power that worketh in us,
The verse centers on "able", "comprehend", "saints", "breadth", "length", "depth", and "height". It is saying that the verse draws attention to "able" and "comprehend", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 17's "That Christ may dwell in your hearts..." into verse 19's "And to know the love of Christ...", so "able" and "comprehend" belong inside that flow. In Ephesians context, the local focus is grace, union with Christ, the church, and new creation.
A plain takeaway is to answer the verse's own emphasis on "able" and "comprehend" with trust shaped by these words, not by a vague optimism outside the passage.