Over against the way of the ungodly, the psalmist sets the way of the righteous. And everything that is said to be lacking in the case of the one is present in the other. Is it true that the wicked will not stand in God’s judgment? Yes. Then, the righteous will stand; he will be justified by the work of Jesus Christ. Is it true that the wicked will be like chaff that the wind blows away? Yes. Then, the righteous will not be like chaff, but rather like grain. 
The psalmist says two important things about the man who walks according to his sinful dispositions. 
First, the course of the wicked man is always downhill. He is caught in a downward progression. This is a very important thing to see about sin. We see it in somebody else and say, “Look how sin has caught that person and dragged him down.” But we add, “That won’t happen to me. I’m going to do just this one little thing. Then I’ll draw the line and I won’t go any further.” But sin is not like that. Sin catches us and draws us along. You cannot sin “just a little bit.”

It is appropriate that one of our series on the great chapters of the Bible should be the first psalm, because this psalm sets before us the doctrine of the two ways and encourages us to walk in the way of the godly. Psalm 1 is also important because it points us to the Lord Jesus Christ. 

I notice something else at the end of the story. It is what I would call instructions on how to celebrate Christmas, the birth of Christ. First, we are told that “when they [the shepherds] had seen him, they spread the word concerning what had been told them about this child” (v. 17). The best way to celebrate Christmas is to make this marvelous story known, which the shepherds did. They spoke to the world about what had happened.

We talk about there being no room in the inn. But the first great question of the story is not: “What is your theology of the person of Christ?” or “What is your theology of God?” or “What is your theology of the atonement?” It is rather: “Do you have room for Jesus?” “Is there room in your heart for the Savior?”