"Cornerstone"

From Wikipedia~"The cornerstone (or foundation stone) concept is derived from the first stone set in the construction of a masonry foundation, important since all other stones will be set in reference to this stone, thus determining the position of the entire structure." 

Ephesians 2:20~"Together, we are his house, built on the foundation of the apostles and the prophets. And the cornerstone is Christ Jesus himself."

My newest favorite song...listen and be blessed, my friends.  

Love to all.