Jesus said,'...on this rock I will build my church'(Mt16:18). The rock is the Father's revelation to Peter that Jesus is the Christ the Son of the living God. Jesus thus builds the church that will be in heaven.
Today's church is built by people making a decision to accept Jesus or invite Jesus into their hearts.
Billy Graham and many others have got thousands to join the local church by this decision evangelism.
This is men building the church on the sand.
The difference between the church on the rock and the church on the sand will for many be the difference between heaven and hell.