A father immerses a ladle in a bucket of water he has just lifted with all his strength from a deep well and hands it to his thirsty daughter.
A grandmother gathers her young grandchildren close to buffer them from the thunder of the missiles overhead and, through the warmth of her body, give them comfort.
On Christmas, and every day, there are angels in Burundi, Argentina and Ukraine. They guard the light in these places and all over the world.