I love the story in the Old Testament about Moses and the Children of Israel. The book of Exodus recounts how God rescued them from slavery and brought them into the Promised Land, the Land of Canaan. Through a series of miracles God broke the will of the Egyptians, proving that He alone is God and that their false gods were no match for Him.
One of the blessed tools God has enabled us to use in this mission is our church facilities. Although the buildings themselves are not intrinsically holy, the fact that we use them to worship God and to teach men, women, boys and girls about Jesus Christ sets these buildings apart unto God. This sanctifies them and MAKES them holy.