Matthew 10:20

And by this their testimony not only was all excuse of ignorance of His divinity taken away from their persecutors, but also to the Gentiles was opened the way of believing on Christ, who was thus devotedly preached by the voices of the confessors among the flames of persecution; and this is that He adds, and the Gentiles. For our faith, observing all the precepts of the Divine will, will be instructed with an answer according to knowledge, after the example of Abraham, to whom when he had given up Isaac, there was not wanting a ram for a victim. For it is not ye who speak, but the Spirit of your Father that speaketh in you.

And together with these, He adds another, and that no small consolation for them, saying, "But when they deliver you up, take no thought how or what ye shall speak, for it shall be given you in that hour what ye shall speak. For it is not ye that speak, but the Spirit of your Father that speaketh in you." For lest they should say, "How shall we be able to persuade men, when such things are taking place?" He bids them be confident as to their defense also. And elsewhere indeed He saith, "I will give you a mouth and wisdom;" but here, "It is the Spirit of your Father that speaketh in you," advancing them unto the dignity of the prophets. Therefore, when He had spoken of the power that was given, then He added also the terrors, the murders, and the slaughters. For this cause then, though He said, "Take no thought what ye shall speak;" yet elsewhere He saith, "Be ready to give an answer to every man that asketh you a reason of the hope that is in you." That is, as long as the contest is among friends, He commands us also to take thought; but when there is a terrible tribunal, and frantic assemblies, and terrors on all sides, He bestows the influence from Himself, that they may take courage and speak out, and not be discouraged, nor betray the righteous cause. For in truth it was a very great thing, for a man occupied about lakes, and skins, and receipt of custom, when tyrants were on their thrones, and satraps, and guards standing by them, and the swords drawn, and all standing on their side; to enter in alone, bound, hanging down his head, and yet be able to open his mouth. For indeed they allowed them neither speech nor defense with respect to their doctrines, but set about torturing them to death, as common pests of the world. For "They," it is said, "that have turned the world upside down, are come hither also;" and again, "They preach things contrary to the decrees of Caesar, saying that Jesus Christ is king." And everywhere the courts of justice were preoccupied by such suspicions, and much influence from above was needed, for their showing both the truth of the doctrine they preached, and that they are not violating the common laws; so that they should neither, while earnest to speak of the doctrine, fall under suspicion of overturning the laws; nor again, while earnest to show that they were not overturning the common government, corrupt the perfection of their doctrines: all which thou wilt see accomplished with all due consideration, both in Peter and in Paul, and in all the rest. Yea, and as rebels and innovators, and revolutionists, they were accused all over the world; yet nevertheless they both repelled this impression, and invested themselves with the contrary, all men celebrating them as saviors, and guardians, and benefactors. And all this they achieved by their much patience. Wherefore also Paul said, "I die daily;" and he continued to "stand in jeopardy" unto the end.

When then we are brought before judges for Christ's sake, we ought to offer only our will for Christ. But Christ who dwelleth in us speaks for Himself, and the grace of the Holy Spirit will minister in our answer.

How or what, one refers to the substance, the other to the expression in words. And because both of these would be supplied by Him, there was no need for the holy preachers to be anxious about either. (ap. Raban.) Meaning, Ye indeed go out to the battle, but it is I who fight; you utter the words, but it is I who speak. Hence Paul speaks, Seek ye a proof of Christ who speaketh in me? (2 Cor. 13:3.)