For the perfecting (pros ton katartismon). Late and rare word (in Galen in medical sense, in papyri for house-furnishing), only here in N.T., though katartisis in 2Co 13:9, both from katartizō, to mend (Mat 4:21; Gal 6:1). “For the mending (repair) of the saints.”
Unto the building up (eis oikodomēn). See note on Eph 2:21. This is the ultimate goal in all these varied gifts, “building up.”