Salvation is not a singularity.  It is not a one-time thing.  It is not a prayer.  Salvation is an incremental deliverance from one kingdom to another, step-by-step, over time.  Discipleship is going from the unknown to the known in attainable steps.  Discipleship happens inwardly through the stewardship of the Holy Spirit of God as well as through Scripture and person-to-person connection through other members of the body of Christ.