Luke 2:16-20 (NIV)
So they hurried off and found Mary and Joseph, and the baby, who was lying in the manger. 17 When they had seen him, they spread the word concerning what had been told them about this child, 18 and all who heard it were amazed at what the shepherds said to them. 19 But Mary treasured up all these things and pondered them in her heart. 20 The shepherds returned, glorifying and praising God for all the things they had heard and seen, which were just as they had been told. 

Hebrews 13:8 (NIV)
Jesus Christ is the same yesterday and today and forever. 

Isaiah 9:2-7 (NIV)
The people walking in darkness have seen a great light; on those living in the land of deep darkness a light has dawned. 3 You have enlarged the nation and increased their joy; they rejoice before you as people rejoice at the harvest, as warriors rejoice when dividing the plunder. 4 For as in the day of Midian’s defeat, you have shattered the yoke that burdens them, the bar across their shoulders, the rod of their oppressor. 5 Every warrior’s boot used in battle and every garment rolled in blood will be destined for burning, will be fuel for the fire. 6 For to us a child is born, to us a son is given, and the government will be on his shoulders. And he will be called Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace. 7 Of the greatness of his government and peace there will be no end. He will reign on David’s throne and over his kingdom, establishing and upholding it with justice and righteousness from that time on and forever. The zeal of the Lord Almighty will accomplish this. 

Matthew 15:7-9 (NIV)
You hypocrites! Isaiah was right when he prophesied about you: 8 “‘These people honor me with their lips, but their hearts are far from me. 9 They worship me in vain; their teachings are merely human rules.’” 

John 4:23-24 (NIV)
Yet a time is coming and has now come when the true worshipers will worship the Father in the Spirit and in truth, for they are the kind of worshipers the Father seeks. 24 God is spirit, and his worshipers must worship in the Spirit and in truth.” 

Romans 12:1 (NIV)
Therefore, I urge you, brothers and sisters, in view of God’s mercy, to offer your bodies as a living sacrifice, holy and pleasing to God—this is your true and proper worship. 

Hebrews 13:15 (NIV)
Through Jesus, therefore, let us continually offer to God a sacrifice of praise—the fruit of lips that openly profess his name.