6. By … by, &c.—rather, as Greek, "In … in," implying not the instrument, but the sphere or element in which his ministry moved.
knowledge—spiritual: in Gospel mysteries, unattainable by mere reason (1Co 2:6-16; 2Co 3:6, 17, 18).
long-suffering … kindness—associated with "charity" or "love" (1Co 13:4), as here.
by the Holy Ghost—in virtue of His influences which produce these graces, and other gifts, "love unfeigned" being the foremost of them.