In Matthew 16:16-18, Peter declared a truth received through revelation. Jesus told him that the Church was going to be built in this fashion of declaring revelation. The word Jesus used for Church is ecclesia. This term was not a word Jesus mysteriously pulled down from heaven — it was a common Greek word in that culture. It refers to a group of people who were citizens of a government, called together in unity and sent out with authority to make decisions to advance their kingdom.