Jesus serves as the foundation of the Church as well as for each Christian's individual life

Mark 11:27-12:12
The authority of Jesus was questioned, Jesus asked them John's baptism was it from heaven, or from men? But the elders  and chief priests, the teachers of the law answered Jesus, "We don't know." Jesus said, "Neither will I tell you by what authority I am doing these things."
Jesus speak a parables: the parable of the Tenants.
The stone the builders rejected has become the capstone; the Lord has done this, and it is marvelous in our eyes? Psalm 118:22,23
Why?
The authority of Jesus came from heaven, but the elders, teachers and priests did not recognize this.
Jesus used the Psalm 118 to describe he is the capstone, the Son of God, but they refuse to these, so they missed the way to eternal life.
In biblical times, a cornerstone was used as the foundation and standard upon which a building was constructed. Once in place, the rest of the building would conform to the angles and size of the cornerstone. In addition, if removed, the entire structure could collapse.
In the Bible, messianic prophecies spoke of the Messiah as the Cornerstone. Isaiah 28:16 says, "Behold, I am the one who has laid as a foundation in Zion, a stone, a tested stone, a precious cornerstone, of a sure foundation."
For those living in societies where people often built their own homes, using construction terminology to explain the priority of Jesus the Messiah as the Cornerstone of the household of God provided a clear connecting point that would have been well understood by the original audience. Today, we read these words and clearly see the Bible's indication that Jesus serves as the foundation of the Church as well as for each Christian's individual life. 
How?
Without Jesus church could not be built and personal life neither. Jesus is my foundation of life.