John 6:38
I am come down (katabebhka). Perfect active indicative of katabainw. See on John 6:33 for frequent use of this phrase by Jesus. Here apo is correct rather than ek with tou ouranou.
Not to do (oux ina poiw). "Not that I keep on doing" (final clause with ina and present active subjunctive of poiew).
But the will (alla to qelhma). Supply ina poiw after alla, "but that I keep on doing." This is the fulness of joy for Jesus, to do his Father's will (John 4:34; John 5:30).
