Jesus is our living cornerstone.
Rejected by man but precious to Him
You yourselves are also like stones that are alive. God is using you, like stones, to build a house where his Spirit lives. You will serve him like his special priests who offer sacrifices to him. God will be happy with the spiritual gifts that you offer to him, because you belong to Jesus Christ.
1 Peter 2:5 EASY
A cornerstone in building is an important part of construction, as it is the first stone to be set and determines the position of all the pieces to be laid afterwards. Cornerstones have been part of building since the Great Pyramids.
There is much wisdom in this.
Things that make ya go hmmm.