All of human history has been marked by the separation of God and Man. There is an intimacy with God that was lost when Adam and Eve sinned that has never been restored even through the tabernacle, the temple, and even now through the indwelling Holy Spirit. But the joy of Christmas is that there is a bright future to set our hope fully on. A future in which our separation from God will be completely removed and our dwelling will be with him.
"And I heard a loud voice from the throne saying, “Behold, the dwelling place of God is with man. He will dwell with them, and they will be his people, and God himself will be with them as their God. He will wipe away every tear from their eyes, and death shall be no more, neither shall there be mourning, nor crying, nor pain anymore, for the former things have passed away.” Revelation 21:3-4