Context / meaning
Matthew 1 [18.] Now the birth of Jesus Christ was like this; for after his mother, Mary, was engaged to Joseph, before they came together, she was found pregnant by the Holy Spirit. Joseph, her husband, being a righteous man, and not willing to make her a public example, intended to put her away secretly. But when he thought about these things, behold,[b] an angel of the Lord appeared to him in a dream, saying, “Joseph, son of David, don’t be afraid to take to yourself Mary, your wife, for that which is conceived in her is of the Holy Spirit. She shall give birth to a son. You shall call his name Jesus,[c] for it is he who shall save his people from their sins.”
Matthew 1 [22.] Now all this has happened, that it might be fulfilled which was spoken by the Lord through the prophet, saying,
Matthew 1 [23.] “Behold, the virgin shall be with child,
and shall give birth to a son.
They shall call his name Immanuel”;
which is, being interpreted, “God with us.”[d]
Matthew 1 [24.] Joseph arose from his sleep, and did as the angel of the Lord commanded him, and took his wife to himself; and didn’t know her sexually until she had given birth to her firstborn son. He named him Jesus.
b. Matthew 1:20 “Behold”, from “ἰδοὺ”, means look at, take notice, observe, see, or gaze at. It is often used as an interjection.
c. Matthew 1:21 “Jesus” means “Salvation”.
d. Matthew 1:23 Isaiah 7:14.