For he is the one about whom the prophet Isaiah had spoken: “The voice of one shouting in the wilderness, ‘Prepare the way for the Lord, make his paths straight.’”

so that what was spoken by the prophet Isaiah would be fulfilled:

In this way what was spoken by the prophet Isaiah was fulfilled: “He took our weaknesses and carried our diseases.”

This fulfilled what was spoken by the prophet Isaiah:

And concerning them the prophecy of Isaiah is fulfilled that says: ‘You will listen carefully yet will never understand, you will look closely yet will never comprehend.

Hypocrites! Isaiah prophesied correctly about you when he said,

As it is written in the prophet Isaiah, “Look, I am sending my messenger ahead of you, who will prepare your way,

He said to them, “Isaiah prophesied correctly about you hypocrites, as it is written: ‘This people honors me with their lips, but their heart is far from me.

As it is written in the book of the words of the prophet Isaiah, “The voice of one shouting in the wilderness: ‘Prepare the way for the Lord, make his paths straight.

and the scroll of the prophet Isaiah was given to him. He unrolled the scroll and found the place where it was written,

John said, “I am the voice of one shouting in the wilderness, ‘Make straight the way for the Lord,’ as the prophet Isaiah said.”

so that the word of the prophet Isaiah would be fulfilled. He said, “Lord, who has believed our message, and to whom has the arm of the Lord been revealed?”

For this reason they could not believe, because again Isaiah said,

Isaiah said these things because he saw Christ’s glory, and spoke about him.

and was returning home, sitting in his chariot, reading the prophet Isaiah.

So Philip ran up to it and heard the man reading the prophet Isaiah. He asked him, “Do you understand what you’re reading?”

So they began to leave, unable to agree among themselves, after Paul made one last statement: “The Holy Spirit spoke rightly to your ancestors through the prophet Isaiah

And Isaiah cries out on behalf of Israel, “Though the number of the children of Israel are as the sand of the sea, only the remnant will be saved,

Just as Isaiah predicted, “If the Lord of Heaven’s Armies had not left us descendants, we would have become like Sodom, and we would have resembled Gomorrah.”

But not all have obeyed the good news, for Isaiah says, “Lord, who has believed our report?”

And Isaiah is even bold enough to say, “I was found by those who did not seek me; I became well known to those who did not ask for me.”

And again Isaiah says, “The root of Jesse will come, and the one who rises to rule over the Gentiles, in him will the Gentiles hope.”