Yea, I say to you, Fear Him This is an emphatic,. repetition of the statement. Christ must be viewed as saying, that when we give way to the dread of men, we pay no respect to God; and that if on the contrary we fear God, we have an easy victory in our hands, so that no efforts of men will draw us aside from our duty. The experience of every age shows the great necessity of this exhortation to the ministers of Christ, and likewise to all believers in general: for there never was a period when men did not rise furiously against God, and endeavor to overwhelm the Gospel. All are not armed indeed with equal power to hold out to believers the dread of death, but the greater number are animated by that savage ferocity, which discovers itself as soon as an opportunity occurs. Frequently, too, Satan brings forward giants, in whose presence the servants of Christ would fall down lifeless, were it not that this doctrine fortifies them to maintain unshaken perseverance. The two clauses being very closely related to each other, it is an incorrect view which some unskilful persons take, by reading separately this clause, Fear them not For Christ, (as we have already said,) in order to cure that wicked fear of men, which draws us aside from the right path contrasts with it a devout and holy fear of God: otherwise the consequence would not follow that, if we fear God, who is the Lord of body and soul, we have no reason to fear men, whose power goes no farther than the body. With regard to the statement that men have power to kill the body, Christ made it by way of concession. God allows wicked men to enjoy such a degree of liberty, that they are swelled with confidence in their own power, imagine that they may attempt any thing, and even succeed in terrifying weak minds, as if they could do whatever they pleased. Now the proud imaginations of wicked men, as if the life of the godly were placed at their disposal, is utterly unfounded: for God keeps them within limits, and restrains, whenever it pleases him, the cruelty and violence of their attacks. And yet they are said to have power to kill by his permission, for he often permits them to indulge their cruel rage. Besides, our Lord's discourse consists of two parts. First, in order to instruct us to bear with composure the loss of the bodily life, he bids us contemplate both eternal life and eternal death, and then arrives gradually at this point, that the protection of our life is in the hand of God.

Fear him - Even the friends of God are commanded to fear God, as a being who has authority to send both body and soul into hell. Therefore it is proper even for the most holy persons to maintain a fear of God, as the punisher of all unrighteousness. A man has but one life to lose, and one soul to save; and it is madness to sacrifice the salvation of the soul to the preservation of the life.

But I will (b) forewarn you whom ye shall fear: Fear him, which after he hath killed hath power to cast into hell; yea, I say unto you, Fear him.
(b) He warns them of dangers that presently hang over their heads, for those that come upon one suddenly make a greater wound.

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.

Fear Him . . . Fear Him--how striking the repetition here! Only the one fear would effectually expel the other.
after he hath killed, &c.--Learn here--(1) To play false with one's convictions to save one's life, may fail of its end after all, for God can inflict a violent death in some other and equally formidable way. (2) There is a hell, it seems, for the body as well as the soul; consequently, sufferings adapted to the one as well as the other. (3) Fear of hell is a divinely authorized and needed motive of action even to Christ's "friends." (4) As Christ's meekness and gentleness were not compromised by such harsh notes as these, so those servants of Christ lack their Master's spirit who soften down all such language to please ears "polite." (See on Mark 9:43-48).

Fear him who hath power to cast into hell - Even to his peculiar friends, Christ gives this direction. Therefore the fearing of God as having power to cast into hell, is to be pressed even on true believers.