Are sharers in flesh and blood (kekoinwnhken aimato kai sarko). The best MSS. read "blood and flesh." The verb is perfect active indicative of koinwnew, old verb with the regular genitive, elsewhere in the N.T. with the locative ( Romans 12:13 ) or with en or ei. "The children have become partners (koinwnoi) in blood and flesh." Partook (metesce). Second aorist active indicative of metecw, to have with, a practical synonym for koinwnew and with the genitive also (twn autwn). That he might bring to nought (ina katarghsh). Purpose of the incarnation clearly stated with ina and the first aorist active subjunctive of katargew, old word to render idle or ineffective (from kata, argo), causative verb (25 times in Paul), once in Luke ( Luke 13:7 ), once in Hebrews (here). "By means of death" (his own death) Christ broke the power (krato) of the devil over death (paradoxical as it seems), certainly in men's fear of death and in some unexplained way Satan had sway over the realm of death ( Zechariah 3:5 ). Note the explanatory tout estin (that is) with the accusative after it as before it. In Revelation 12:7 Satan is identified with the serpent in Eden, though it is not done in the Old Testament. See Romans 5:12 ; John 8:44 ; John 14:30 ; John 16:11 ; 1 John 3:12 . Death is the devil's realm, for he is the author of sin. "Death as death is no part of the divine order" (Westcott).