Jesus' kingdom was not like the popular expectation. He used the phrase 'kingdom of God' with a different meaning. His kingdom was not of this world (John 18:36). It was not like the kingdoms of this world. It was the kingdom of God, a supernatural kingdom. It was invisible to most people (John 3:3)-it could not be understood or experienced without the Holy Spirit (v. 6). God is Spirit, and the kingdom of God is a spiritual kingdom.