Strengthen ye - That is, you who are the religious teachers and guides of the people. This is an address made by the prophet in view of what he had said and was about to say of the proraised blessings. The sense is, strengthen and sustain the feeble and the desponding by the promised blessings; by the assurances Isaiah 34 that all the enemies of God and his people will be destroyed; and that he will manifest himself as their Protector, and send upon them the promised blessings. Or it may be regarded as addressed to the officers and ministers of religion when these blessings should have come; and as being an exhortation to them to make use of the influences, the promises, and the consolations which would attend the coming of the Messiah, to strengthen the feeble, and confirm those who were faint-hearted.

The weak hands, and confirm the feeble knees - Strength resides mainly in the arms, and in the lower limbs, or the knees. If these are feeble, the whole frame is feeble. Fear relaxes the strength of the arms, and the firmness of the knees; and the expressions 'weak hands,' and 'feeble knees,' become synonymous with saying, of a timid, fearful, and desponding frame of mind. Such were to be strengthened by the assurance of the favor of God, and by the consolations which would flow from the reign of the Messiah. The Jews, who looked abroad upon the desolations of their country, were to be comforted by the hope of future blessings; those who lived in those future times were to be consoled by the assurances of the favor of God through the Messiah (compare the notes at Isaiah 40:1).

Strengthen ye the weak hands,.... These are the words of the prophet, as the Targum,

"the prophet said, strengthen the weak hands;''

or rather of God, by the prophet, to the converted Gentiles, to those who saw the glory of the Lord; particularly to the ministers of the Gospel, who have to do with weak and feeble persons, who can scarcely lift up their hands, or stand upon their legs, under a sense of sin, in a view of wrath, and immediate ruin and destruction, ready to sink and faint, because of their enemies, or through want of food; and their business is to comfort and strengthen them, by preaching the Gospel, and pointing out the promises of it to them:

and confirm the feeble knees; that so they may keep their ground against their enemies; shake off their fears and trembling; go on their way courageously and rejoicing; run, and not be weary; walk, and not faint: "hands" and "knees" are mentioned particularly, because a man's strength lies greatly in them; and his weakness is seen by the languor and trembling of them.

The prophet now exclaims to the afflicted church, in language of unmixed consolation, that Jehovah is coming. "Strengthen ye the weak hands, and make the trembling knees strong! Say to those of a terrified heart, Be strong! Fear ye not! Behold, your God will come for vengeance, for a divine retribution: He will come, and bring you salvation." Those who have become weak in faith, hopeless and despairing, are to cheer up; and the stronger are to tell such of their brethren as are perplexed and timid, to be comforted now: for Jehovah is coming nâqâm (i.e., as vengeance), and gemūl 'Elōhı̄m (i.e., as retribution, such as God the highly exalted and Almighty Judge inflicts; the expression is similar to that in Isaiah 30:27; Isaiah 13:9, cf., Isaiah 40:10, but a bolder one; the words in apposition stand as abbreviations of final clauses). The infliction of punishment is the immediate object of His coming, but the ultimate object is the salvation of His people (וישעכם a contracted future form, which is generally confined to the aorist).

{d} Strengthen ye the weak hands, and confirm the feeble knees.

(d) He wills all to encourage one another, and especially the ministers to exhort and strengthen the weak, that they may patiently abide the coming of God, which is at hand.

35:3 Strengthen - Ye ministers of God, comfort and encourage God's people, who are now ready to faint.

3. Strengthen . hands . confirm . knees-The Hebrew for "strengthen" refers to the strength residing in the hand for grasping and holding a thing manfully; "confirm," to the firmness with which one keeps his ground, so as not to be dislodged by any other [Maurer]. Encourage the Jews, now desponding, by the assurance of the blessings promised.

35:1-4 Judea was prosperous in the days of Hezekiah, but the kingdom of Christ is the great subject intended. Converting grace makes the soul that was a wilderness, to rejoice with joy and singing, and to blossom abundantly. The feeble and faint-hearted are encouraged. This is the design of the gospel. Fear is weakening; the more we strive against it, the stronger we are, both for doing and suffering; and he that says to us, Be strong, has laid help for us upon One who is mighty. Assurance is given of the approach of Messiah, to take vengeance on the powers of darkness, to recompense with abundant comforts those that mourn in Zion; He will come and save. He will come again at the end of time, to punish those who have troubled his people; and to give those who were troubled such rest as will be a full reward for all their troubles.