The word ‘Amen,’ so commonly spoken at the end of most prayers, essentially means ‘I agree.’  ‘Amen’ is an expression used when two people have finished praying together.  Like so many Christian practices, prayer is meant to be exercised in community (as well as alone.)  No one can have a full relationship with God until they share Him with others.  When two or more gather together to celebrate Christ his Spirit is made manifest in the heart of every believer; those who are weak become strong; doubt is replaced by faith; the empty are made full, and every weary soul becomes glad.  An isolated Christian is a Christian who is weak and vulnerable to attack.  To avoid fellowship with believers is to avoid fellowship with Christ himself.