Worship

Behold, how good and how pleasant [it is] for brethren to dwell together in unity! 2 [It is] like the precious ointment upon the head, that ran down upon the beard, [even] Aaron's beard: that went down to the skirts of his garments; 3 As the dew of Hermon, [and as the dew] that descended upon the mountains of Zion: for there the LORD commanded the blessing, [even] life for evermore.
Psalms 133
Proper Worship - Deuteronomy 12
(the proper Name, the proper place, and the proper offerings)

True Worship
(as defined by our Lord Jesus Christ)

The Sin of Jeroboam, the Son of Nebat
(a picture of much of the practices of today's Christianity)