The joyous challenge of Christmas is to see each person we meet as a small child of God

When he brings the first-born into the world, he says, 'Let all God's angels worship him.' (Hebrews 1:6) 

The reading from the letter to the Hebrews for the Mass on this year's Christmas Day included a completion of a prophecy from Deuteronomy (32:43): when Jesus was born, angels did indeed worship him, singing "Glory to God in the highest!"

God has appeared in flesh, he became visible and so "we have seen his glory" (John 1:15), as the psalmist predicted: “Your throne, O God, is for ever and ever, the righteous sceptre is the sceptre of your kingdom” (45:6).