Paradigm shift

I know quite a few people with a wide variety of religious beliefs.  A large number of Protestants, Catholics, Sikhs, Jehovah's Witnesses, Mormons, and some quasi-Protestant folks.  Each of these believe that their belief system is right and they are, for the most part, faithful to the truth.
Obviously, only one of those groups or none of them, is correct.  The big question is, for anyone in one of these groups that believes in the importance of evangelism, how do we convince someone to move from their current belief system into another.  This is called a paradigm shift.  This shift involves a radical change in belief.
For many of the Protestant groups, this involves academic dialog.  A debate to prove the other wrong by pointing out errors or inconsistencies in a belief system. 
But for the Orthodox Christian, this is not so.  St. Seraphim of Sarov really summarized it best.  He said, "Be filled with the Holy Spirit and a thousand around you will be saved."  In essence, this is calling us to pursue our own sanctification and relationship with God and in doing so, in a mystical manner, influence those around us.  The western mind so much wants to intellectually direct others.  But this is not how we are saved.  Our salvation comes about by the purification of our hearts by the power of the Holy Spirit through the sacraments, through prayer, through fasting and through almsgiving.  When our hearts are purified, we are open and receptive to the love of God.  We are capable of communing with God.
The person who is holy will shine divine light into everyone they meet.  Conversion and sanctification is the work of God, not man.