There are many ways a person can become a citizen of a particular country. People are conquered and taken captive as slaves, others do so voluntary and still others come illegally. It is interesting to note that all three groups have a different attitude when they become members of a different kingdom. The first group is force to become a member in fear of death or severe punishment. Their attitude is a longing to escape and return to the country and the life that they once knew. The second group comes with a admiration, love and expectation and a sense of longing to be a part of that people group. They assimilate and submit to the new country's authority and become citizens. The third group comes to enjoy the benefits of that country, but never settles in and commits to the commands, laws and values of that society. They exploit the country for their own benefit and return back to their country of origin.
The same can be said of the church and the kingdom of God. Some are bound by their own slavery of works hoping to do enough good and then be let in to Heaven. Others have voluntarily given their rights over to Christ the King and have found peace in the new kingdom. Still many, I fear are illegals, exploiting the benefits of God's kingdom but never committing themselves to Christ and thus never settling in to the peace he provides. Jesus said unless we be converted and become like little children we will not enter the kingdom of heaven. There is only one people group will enter Christ's Kingdom, those who voluntarily submit to his authority.
