What is the meaning of Christ being the following.?

It means that he is the foundation of the Church- cornerstone, he is the head of the Church- Capstone, he is the greatest debate in history of authenticity- Stumbling block and he is the one that many reject as their life giver and so will die- the smiting stone but don't blame him for death as it is our choice to accept life or reject it and it grieves him deeply that so many would rather choose death over life.