Something I love about liturgical Christianity is the Lectionary. Every congregation around the world unites in the same Bible readings each day at Mass. Not only that, but the different readings present an inner harmony that ties them together. This is especially apparent in the readings for today's Mass:
Reading 1 Is 8:23—9:3
"The people who walked in darkness have seen a great light; upon those who dwelt in the land of gloom a light has shone."
Psalm Ps 27:1, 4, 13-14
"The LORD is my light and my salvation; whom should I fear?"
Gospel Mt 4:12-23
"Jesus left Nazareth and went to live in Capernaum by the sea,in the region of Zebulun and Naphtali, that what had been said through Isaiah the prophet might be fulfilled: Land of Zebulun and land of Naphtali,the way to the sea, beyond the Jordan,Galilee of the Gentiles,the people who sit in darkness have seen a great light,on those dwelling in a land overshadowed by death light has arisen."