An open letter from J. Paul Landry, president of Latin American Mission, suggests reasons for the success in Medellin. He cites 'unity among the pastors' as the key and says, "No single denomination or movement can reach every sector of society in a whole city. But as all pastors and members of all churches unite for this purpose, they can do it.' Another factor he mentions is the Christ-like character of the pastors. He relates the following story...

The following article from Latin American Mission magazine encapsulates the vision of Christ for the Cities and outlines key principles, then takes a quick look at their work in Medellin.

Through the Christ for the City program, we are attempting to mobilize the evangelical church to effectively evangelize the major cities of Latin America. Our vision is that ten percent of the people in every world-class city in the Latin world has a meaningful relationship with the Lord Jesus Christ and be united in the joyous task of preaching grace and doing justice in the power of the Holy Spirit.

The key principles of Christ for the City are:

To Further The Church. We are helping build a strong national church that is culturally relevant, combining effective evangelism with discipleship training and church planting.

To Empower Nationals. North American missionaries work alongside, and often under, national leaders in this massive effort. Only as national believers are trained and encouraged to do the job, will their cities be evangelized.

To Encourage Unity Among Evangelicals. The Holy Spirit does remarkable things when churches and denominations pray and work together. We will not launch the Christ for the City program in a city unless the majority of the churches are participating.

To Effectively Engage in Spiritual Warfare. Prayer is the backbone of the Christ for the City movement. Our battle is not with people, but with powers and principalities.