"To them God chose to make known how great among the Gentiles are the riches of the glory of this mystery, which is Christ in you, the hope of glory."
(Colossians 1:27 ESV)
To feel at home in heaven we will need to have the mind of Christ now. Many of us allow our bodily appetites, and bad thinking to dominate our inner person. We are spiritual beings with physical bodies. And until we allow the Holy Spirit (who is in all believers) to dominate our thinking, we will live a life ruled by carnal and negative thoughts, which produces less than desirable behavior in our lives.
Our outward behavior is a reflection of our true spiritual condition. If we are true believers, then we have been justified by our faith in Jesus Christ, which means we have been made right with God. But God wants more than reconciliation, (which is just the beginning) he wants a living, active relationship with us. So, we must allow Him to correct our thinking. Repentance is giving up our thoughts, and opinions, and replacing them with God's thoughts, and his truth.
True repentance results in a change of behavior. But this is an ongoing process, so we have to live a life of repentance, which is life lived according to the Kingdom of God (the rule of God). I'm not talking about the repentance that leads to our initial salvation experience, but to that which leads us to greater intimacy with God, on a daily basis.
Many in the Evangelical Church seem to neglect the reality of the indwelling Holy Spirit. Without a good theology of the work of the Spirit, and our ongoing communion, and fellowship with God, we tend to become legalistic, and spiritually dry. It's vital to the life of the believer, and the life of the Church as a whole, to rediscover the third Person of the Trinity.
"Christ in you, the hope of glory" does not make us little "gods" in the way that new agers perceive themselves. We must acknowledge that we are not divine, but are in desperate need of the life of God inside of us. And God has given us access to that life, through the Holy Spirit.
The two excllent books that I'm presently reading on having the mind of Christ are: "Being At Ease: Thinking At Ease-Lessening Disease" by Jim Hylton, which is deeply thought provoking, and an academic, but readable book, "The Mind Of The Spirit"by Craig S. Keener. - Bobby