The human race is evolving and changing. God isn't, but our ability to receive his leading makes it look that way. The stories in the Bible describe different states of religious consciousness - or "churches", from Adam and Eve, to Noah, to Abraham, and then to the Christian church.
Human history can be seen as a series of 'churches', or spiritual mindsets. Not tabernacles or temples or cathedrals, but ways of understanding God, and trying to do His will.
Human religious history can be seen as having had 5 main phases.
For Christians, Christmas time is one of the most sacred, most joyous celebrations of the year. What about for people who are thinking about it, but who aren't sure about the whole "reason for the season"?