Jamieson, Fausset & Brown, on 1Cor 15:50

(See on Co1 15:37; Co1 15:39). "Flesh and blood" of the same animal and corruptible nature as our present (Co1 15:44) animal-souled bodies, cannot inherit the kingdom of God. Therefore the believer acquiesces gladly in the unrepealed sentence of the holy law, which appoints the death of the present body as the necessary preliminary to the resurrection body of glory. Hence he "dies daily" to the flesh and to the world, as the necessary condition to his regeneration here and hereafter (Joh 3:6; Gal 2:20). As the being born of the flesh constitutes a child of Adam, so the being born of the Spirit constitutes a child of God. cannot--Not merely is the change of body possible, but it is necessary. The spirit extracted from the dregs of wine does not so much differ from them, as the glorified man does from the mortal man [BENGEL] of mere animal flesh and blood (Gal 1:16). The resurrection body will be still a body though spiritual, and substantially retaining the personal identity; as is proved by Luk 24:39; Joh 20:27, compared with Phi 3:21. the kingdom of God--which is not at all merely animal, but altogether spiritual. Corruption doth not inherit, though it is the way to, incorruption (Co1 15:36, Co1 15:52-53).