Passage
For this cause I Paul, the prisoner of Christ Jesus in behalf of you Gentiles,--
For this cause I Paul, the prisoner of Christ Jesus in behalf of you Gentiles,--
Ephesians 3:1 For this cause I Paul, the prisoner of Christ Jesus in behalf of you Gentiles,--
Ephesians 3:2 if so be that ye have heard of the dispensation of that grace of God which was given me to you-ward;
Ephesians 3:3 how that by revelation was made known unto me the mystery, as I wrote before in few words,
The verse centers on "cause", "paul", "prisoner", "christ", "jesus", "behalf", and "gentiles". It is saying that the verse draws attention to "cause" and "paul", so its meaning should be read from those terms before moving to application.
The next verse adds "if so be that ye have heard...", so "cause" and "paul" should be read forward into that movement. 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 "cause" and "paul" with trust shaped by these words, not by a vague optimism outside the passage.