We as Christians are called to be salt and light in this world.  When Jesus spoke this to the disciples they knew how valuable salt was.  Without salt mankind would not be able to survive in this world and the earth would decay.  Light is used to attract things and to help people get to where they need to go.  

This week we focus in on the exousia (authority) of the Christian and how it is to be combined with the dunamis (power) of the Holy Spirit.  The gospel of the Kingdom of God is the theme Jesus taught on the most.  It is a message Jesus considered to be important for the disciples to know.  As Christians we have to know that we have authority.  If we don't know we have authority then it does us no good when we go about a daily walk.  For far too long Christians have been trying to use dunamis power to fight the dunamis power of the enemy.  Jesus tells us in Luke 10:19 that the devil has dunamis power but He (Christ) has given us the authority to overcome the enemy.