Verse 5. - But I will forewarn you whom ye shall fear: Fear him, which after he hath killed hath power to cast into hell; literally, into Gehenna. This is simply Gee-hinnom, "valley of Hinnom," translated into Greek letters· This valley was situated in the neighborhood of Jerusalem, and originally was noted for the infamous rites practiced there in the worship of Moloch, in the times of the idolatrous kings of Judah. King Josiah, to mark his abhorrence of the idol-rites, defiled it with corpses; fires were subsequently kindled to consume the putrefying matter and prevent pestilence. The once fair valley, thus successively defiled with hideous corrupting rites, by putrefying corpses, and then with blazing fires lit to consume what would otherwise have occasioned pestilence, was taken by rabbinical writers as a symbol for the place of torment, and is used not unfrequently as a synonym for "hell." The translators of the Authorized Version have done so here. The reminder is, after all, we need not fear men. When they have done their worst, they have only injured or tortured the perishable body. The One whom all have good reason to fear is God, whose power is not limited to this life, but extends through and beyond death. Some have strangely supposed, not God, but the devil, is intended here to be the real object of human fear. The devil can be no object of fear to the Master's disciples.

12:1-12 A firm belief of the doctrine of God's universal providence, and the extent of it, would satisfy us when in peril, and encourage us to trust God in the way of duty. Providence takes notice of the meanest creatures, even of the sparrows, and therefore of the smallest interests of the disciples of Christ. Those who confess Christ now, shall be owned by him in the great day, before the angels of God. To deter us from denying Christ, and deserting his truths and ways, we are here assured that those who deny Christ, though they may thus save life itself, and though they may gain a kingdom by it, will be great losers at last; for Christ will not know them, will not own them, nor show them favour. But let no trembling, penitent backslider doubt of obtaining forgiveness. This is far different from the determined enmity that is blasphemy against the Holy Ghost, which shall never be forgiven, because it will never be repented of.But I will forewarn you whom ye shall fear, I will be your monitor, and direct you to the proper object of fear and reverence, and whom you should be careful to displease and offend:

fear him, which after he hath killed; your body, as the Persic version adds; hath taken away the life of it, by separating soul and body asunder, by sending one disease or another, or death in one shape or another:

hath power to cast into hell; your soul, as the above version also adds; yea, to destroy both body and soul in hell, as in See Gill on Matthew 10:28.

yea, I say unto you, fear him; and none else, not with a servile, but with a filial fear.