That it might be fulfilled which was spoken by Esaias the prophet, saying,

That it might be fulfilled which was spoken by Isaias the prophet, saying:

that those words of the Prophet Isaiah might be fulfilled,

So that what was said by Isaiah the prophet might come true,

Then what was spoken through the prophet Isaiah was fulfilled, saying:

in fulfillment of these words in the prophet Isaiah –

That it might be fulfilled which was spoken Matthew does not mean that this prediction was entirely fulfilled by Christ's prohibiting loud and general reports to be circulated respecting his power. , but that this was an exhibition of that mildness which Isaiah describes in the person of the Messiah. Those wonderful works which Christ performed in presence of a few, and which he did not wish to be announced in pompous terms, were fitted to shake heaven and earth, (Hebrews 12:26.) It was, therefore, no ordinary proof, how widely he was removed from the pomp and ostentation of the world. But it will be proper for us to examine more closely the design of Matthew. By this circumstance he intended to show, that the glory of Christ's divinity ought not to be the less admired, because it appeared under a veil of infirmity. This is unquestionably the very object to which the Holy Spirit directed the eyes of the prophet. The flesh is constantly longing for outward display, and to guard believers against seeking any thing of this description in the Messiah, the Spirit of God declared that he would be totally different from earthly kings, who, in order to draw admiration upon themselves, produce great noises wherever they go, and fill cities and towns with commotion. We now perceive how appropriately Matthew applies the prediction of the prophet to the case in hand. God appointed for his Son a low and mean appearance, and that ignorant persons may not take offense at an aspect which has no attraction, and is fitted to awaken contempt, both the prophet and Matthew come forward to declare, that it is not by accident, but in consequence of a decree of Heaven, that he assumes such a character. Hence it follows, that deep blame attaches to all who despise Christ, because his outward condition does not correspond to the wishes of the flesh. We are not at liberty to imagine to ourselves a Christ that corresponds to our fancy, but ought simply to embrace him as he is offered by the Father. He who is offended by the low condition of Christ, which God declares to be agreeable to his will, is unworthy of salvation. I now come to examine the words of the prophet, (Isaiah 42:1.)

That it might be fulfilled - Matthew here quotes a passage from Isaiah 42:1-4, to show the "reason why he thus retired from his enemies and sought concealment." The Jews, and the disciples also at first, expected that the Messiah would be a conqueror, and vindicate himself from all his enemies. When they saw him retiring before them, and, instead of subduing them by force, seeking a place of concealment, it was contrary to all their previous notions of the Messiah. Matthew by this quotation shows that "their" conceptions of him had been wrong. Instead of a warrior and an earthly conqueror, he was "predicted" under a totally different character. Instead of shouting for battle, lifting up his voice in the streets, oppressing the feeble - "breaking bruised reeds and quenching smoking flax, as a conqueror" - he would be peaceful, retiring; would strengthen the feeble, and would cherish the faintest desires of holiness. This appears to be the general meaning of this quotation here. Compare the notes at Isaiah 42:1-4.

That it might be fulfilled which was spoken by Esaias the prophet, saying. Isaiah 42:1 not that Christ gave the above charge with this view, that this passage in Isaiah might have its accomplishment: but this is an observation of the evangelist, that what was now done by Christ, by his private departure from the Pharisees, being unwilling to irritate them more; by his preaching to the Idumeans, Tyrians, and Sidonians; by healing their diseases, and shunning all ostentation and popular applause; and prohibiting to tell who and where he was, was a fulfilling of this prophecy; in which the Holy Spirit foreknowing the disposition and actions of Christ, predicted them: which, when considered, must be looked upon as a very large proof of the truth of his being the Messiah. For that this prophecy belongs to the Messiah, is owned by the Jews themselves (k).
(k) Targum & Kimchi in loc. Abarbinel Mashmia Jeshua, fol. 9. 1, 2. & 10. 1, 2. & 21. 2. & in Is. fol 64. 3, 4. R. Isaac Chizzuk Emuna, p. 299.

That it might be fulfilled which was spoken by Esaias the prophet, saying-- (Isaiah 42:1).

That it might be fulfilled. Thus it was fulfilled.
Esaias the prophet. Isaiah 42:1-4.