{Now this} (	o de). Paul picks out the verb anabas
(second aorist active participle of anabain(935c), to go up),
changes its form to aneb(885c) (second aorist indicative), and
points the article (	o) at it. Then he concludes that it
implied a previous katabas (coming down). {Into the lower parts
of the earth} (eis ta kat(9374)era t(8873) g(8873)). If the anabas is the
Ascension of Christ, then the katabas would be the Descent
(Incarnation) to earth and 	(8873) g(8873) would be the genitive of
apposition. What follows in verse  10  argues for this view.
Otherwise one must think of the death of Christ (the descent into
Hades of  Ac 2:31 ).