People "exploring" Christianity are disconnected from God and have yet to begin a personal relationship with Jesus.
Infant Christ-follower. Much like physical development, spiritual development begins with dependence upon other Christ-followers for development in their "baby steps."
Beginning to take increasing steps specifically through the five characteristics of a Christ-centered life. Enthusiastic about their faith with many significant steps still to be made.
Moving into a God-first and others-first outlook. Beginning to make significant contributions to God's Kingdom and living for God's purpose.
Experiencing the joy of Christ by defining everything in their life by their position and purpose in Christ. They are reproducing their faith and life in other Christ-followers in the preceding stages.