Cornerstone in the Bible - a Christian perspective
God's kingdom on earth is built on the faith of believers from throughout history, but supporting it all as the cornerstone of the church is Jesus Christ himself. And having been saved by Jesus, we're admitted into the very family of God.
"Sons of God" in the Bible: Galatians 3:26
When we gain salvation through Jesus Christ, we aren't just getting a free ticket to heaven. We actually become part of the family of God, and He relates to us like a father to his children. God's love for us goes far beyond that of a ruler's for his subjects.