The danger in the seasonal celebration is that we cave to sentimentality and rote nostalgia and thus forget that the meek and mild baby in a manger was nothing short of the opening salvo in the kingdom of heaven revolution consisting in God personally invading earth.
This holiday season, we will toss around words like "spirit," "grace," "peace," and "hope." The Bible will not let us have these ideas merely as ideas, as things. They are personal. Thus: "He himself is our peace" (Micah 5:5; Eph. 2:14) and "God is love" (1 John 4:8). Let's not mess with ethereal virtues, no matter how Christianly gauzed. Leave ethereal virtues to vague saviors. Our Savior is incarnate!
Sinclair Ferguson brings it home:
[R]emember that there isn't a thing, a substance, or a "quasi-substance" called "grace." All there is is the person of the Lord Jesus --- "Christ clothed in the gospel," as Calvin loved to put it. Grace is the grace of Jesus. If I can highlight the thought here: there is no "thing" that Jesus takes from Himself and then, as it were, hands over to me. There is only Jesus Himself.
Don't "spiritualize" Christmas. It isn't a theory. It's not a vague virtue or warm fuzzy. It smells like sawdust and straw and manure, and like myrrh and newborn baby skin. Christmas is a real thing that really happened. And it's really good news. Take it personally.