Hunt clarifies the meaning of the Kingdom of God in Chapter 12 of his book:
“Jesus emphasized that the kingdom of God does not come with outward observance, but rather, ‘the kingdom of God is within you’ (Luke 17:21). That directs us to the mind [soul, will], the area where God wants to work. The changes that He brings in our life are secret and inward, but these changes are likely to bear outward fruit. The outward fruit is only a visible symbol of inner change.
“Jesus said, ‘Seek first His kingdom and His righteousness’ (Matthew 6:33). Seeking the kingdom within, in our heart [soul], must take priority. Our outward witness and our going as missionaries will be ineffective if we are not changed inwardly.”