20 But when he was giving thought to these things, an angel of the Lord came to him in a dream, saying, Joseph, son of David, have no fear of taking Mary as your wife; because that which is in her body is of the Holy Spirit. 21 And she will give birth to a son; and you will give him the name Jesus; for he will give his people salvation from their sins. 22 Now all this took place so that the word of the Lord by the prophet might come true, 23 See, the virgin will be with child, and will give birth to a son, and they will give him the name Immanuel, that is, God with us. 24 And Joseph did as the angel of the Lord had said to him, and took her as his wife;
Matthew Henry's Commentary on Matthew 1:20-24
Commentary on Matthew 1:18-25
(Read Matthew 1:18-25)
Let us look to the circumstances under which the Son of God entered into this lower world, till we learn to despise the vain honours of this world, when compared with piety and holiness. The mystery of Christ's becoming man is to be adored, not curiously inquired into. It was so ordered that Christ should partake of our nature, yet that he should be pure from the defilement of original sin, which has been communicated to all the race of Adam. Observe, it is the thoughtful, not the unthinking, whom God will guide. God's time to come with instruction to his people, is when they are at a loss. Divine comforts most delight the soul when under the pressure of perplexed thoughts. Joseph is told that Mary should bring forth the Saviour of the world. He was to call his name Jesus, a Saviour. Jesus is the same name with Joshua. And the reason of that name is clear, for those whom Christ saves, he saves from their sins; from the guilt of sin by the merit of his death, and from the power of sin by the Spirit of his grace. In saving them from sin, he saves them from wrath and the curse, and all misery, here and hereafter. Christ came to save his people, not in their sins, but from their sins; and so to redeem them from among men, to himself, who is separate from sinners. Joseph did as the angel of the Lord had bidden him, speedily, without delay, and cheerfully, without dispute. By applying the general rules of the written word, we should in all the steps of our lives, particularly the great turns of them, take direction from God, and we shall find this safe and comfortable.