Ephesians 2:20-21 NLT Together, we are his house, built on the foundation of the apostles and the prophets. And the cornerstone is Christ Jesus himself.  We are carefully joined together in him, becoming a holy temple for the Lord.
The cornerstone is a guide to the structure.
Since ancient times, builders have used cornerstones in their construction projects. A cornerstone was the principal stone, usually placed at the corner of a building, to guide the workers in their course. The cornerstone was usually one of the largest, the most solid, and the most carefully constructed of any in the building. The Bible describes Jesus as the cornerstone that His church would be built upon. He is foundational. Matthew 16:15-18 He said to them, “But who do you say that I am?” Simon Peter answered, “You are Christ, the Son of the living God.” And Jesus said to him, “Blessed are you, Simon Barjona, because flesh and blood did not reveal this to you, but My Father who is in heaven. “I also say to you that you are Peter, and upon this rock I will build My church; and the gates of Hades will not overpower it. Once the cornerstone was set, it became the basis for determining every measurement in the remaining construction; everything was aligned to it. As the cornerstone of the building of the church, Jesus is our standard of measure and alignment.
Jesus, as our cornerstone, is a guide for our lives.
As we come to Jesus and begin to build our lives according to the orientation of the Christ Cornerstone, we will be a strong well equipped Christian growing in the faith and power of the Holy Spirit. There may be areas of your life that need to be torn down because they do not align with the cornerstone. A building with only part of the construction aligned with the cornerstone of Christ will fall just as surely as one without any cornerstone.
A Precious and proven cornerstone. Safe to build on.
Isaiah 28:16 (1Peter 2:26) Therefore, this is what the Sovereign Lord says: “Look! I am placing a foundation stone in Jerusalem, a firm and tested stone. It is a precious cornerstone that is safe to build on. Whoever believes need never be shaken.” God was speaking of His only Son who would come to earth to give direction and provide an escape from sin and death if they had faith in Him.
Rejected by men but chosen by God
1 Peter 2:4 You are coming to Christ, who is the living cornerstone of God’s temple. He was rejected by people, but he was chosen by God for great honor.
Read Bible daily, pray, go to a church that preaches the truth of sin and eternity, rather than very soft sermons.
Build your life on the precious cornerstone of Jesus Christ. Allow your life to be carefully joined together on this rock. Test everything against the cornerstone. If it does not line up with the cornerstone, remove it. Your life will be blessed and will never be shaken.