12. For--with a view to; the ultimate aim. "Unto."
      perfecting--The Greek implies correcting in all that is deficient, instructing and completing in number and all parts.
      for--a different Greek word; the immediate object. Compare Ro 15:2, "Let every one . . . please his neighbor for his good unto edification."
      the ministry--Greek, "ministration"; without the article. The office of the ministry is stated in this verse. The good aimed at in respect to the Church (Eph 4:13). The way of growth (Eph 4:14-16).
      edifying--that is, building up as the temple of the Holy Ghost.

JFB.