It's a black-and-white movie Christmas, with snow falling as joyful families mingle on city sidewalks while window-shopping -- buying food, presents, decorations and fresh-cut trees for festivities that are only two days away.

For Americans, this scene represents the ghost of Christmas past, long before suburban malls, big-box scrums and Amazon.com. And as "The Bishop's Wife" opens, an angel -- a graceful Cary Grant -- enters this 1947 tableau, smiling at carolers and children and helping the needy and lost.

"Christmas is always in danger in Christmas movies -- we'd have no reason to make such movies otherwise," wrote critic Titus Techera, executive director of the American Cinema Foundation. In this classic movie, "we have a remarkable concentration of problems in one household: A man's faith, his family, community and church … are all tied together."

It isn't unusual to find miracles, tight-knit communities, glowing churches and parables about human choices, temptation, sin and redemption in old Christmas films, said Techera, contacted by Zoom while visiting Bucharest.

That's why Techera -- a native of Romania, before his work brought him to America -- has written four online essays about the lessons learned from watching '40s movies that were remade in the '90s. The other films in this Acton Institute series are "The Shop Around the Corner," "Miracle on 34th Street" and "Christmas in Connecticut."

There's a reason many modern Americans keep watching these movies, he said. Some yearn for a time before most Americans became so isolated, separated by jobs far from extended families, sprawling suburban neighborhoods and all the paradoxes built into digital networks that were supposed to keep people connected.

"What we see in these movies is a time when Christmas was a far less commercial celebration and there was quite a bit of continuity with traditions from the past. … For many, the church was part of that," he said. "Christmas was a family thing. It was a community thing. … Commerce was more subservient to ordinary life. Commerce had not taken over all of life, including Christmas."