Tertullian

“ Flesh and blood, therefore, must in every case rise again, equally, in their proper quality. But they to whom it is granted to enter the kingdom of God, will have to put on the power of an incorruptible and immortal life; for without this, or before they are able to obtain it, they cannot enter into the kingdom of God. With good reason, then, flesh and blood, as we have already said, by themselves fail to obtain the kingdom of God. ”