Matthew 16:13-18, John 14:6
“You are the Christ, the Son of the Living God.” - That revelation from God is what Jesus builds His church on.
He isn’t building His church on love. He isn’t building His church on the right kind of worship service, or making a better world, or social activism or political activism, or popular preaching or preachers.
When it is revealed to the human heart that Jesus is the One sent by God, the ONLY ONE sent by God, everything else falls into place. Real worship will happen. Right conduct and attitudes will happen, and The Gospel will be shared.