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The Spiritual Vacuum

Matthew 12:43-45
'When an impure spirit comes out of a person, it goes through arid places seeking rest and does not find it. Then it says, "I will return to the house I left." When it arrives, it finds the house unoccupied, swept clean and put in order. Then it goes and takes with it seven other spirits more wicked than itself, and they go in and live there. And the final condition of that person is worse than the first. That is how it will be with this wicked generation.' (NIVUK)

'Nature abhors a vacuum' - this was apparently first stated by the Greek physicist and philosopher Parmenides around 485BC.  Others including Aristotle have been credited with using the expression.  In physics it means that if you remove everything, then something has to fill the space.  A vacuum is always in tension with its surroundings.  That is helpful as we use a vacuum cleaner to suck up dirt.
 
Jesus was talking to religious leaders about their practice of exorcism - commanding an unclean/impure/evil spirit to leave a person or place (Matthew 12:25-28).  He did not question the existence of evil spirits; indeed, He would cast them out of people (Matthew 8:16).  Nor did He challenge the need for their authority to be taken away, nor the peace which comes to a demonised individual when it leaves (Mark 5:15).  But He made His hearers consider what happens to an evil spirit that is commanded to go.
 
Jesus' explanation is simple.  The 'house' is a person's soul.  If the evil spirit is sent out, like an unauthorised tenant being evicted, the ‘house’ is empty.  But there is no reason why it will not return unless the 'house' is filled with a stronger spirit.  The 'house' has been made clean, and there is now even more room for evil, allowing other wicked spirits to also take up residence.  The point which Jesus was making was that although the Jewish exorcists might be able to send some demons away, they had nothing to offer which would stop them returning.  That is why people are so vulnerable if they try to get rid of darkness without receiving the Lord to fill their ‘house’.
 
By contrast, Jesus promised His Holy Spirit to fill the hearts which He had healed (John 14:16-18).  He does not remove Satan's influence and leave a spiritual vacuum.  When Jesus deals with the oppression of Satan in someone's life He also promises to fill them with His Holy Spirit (Romans 8:9).  So the intervention of Jesus has two significant effects: He removes the authority of the 'Prince of this world' when sins are forgiven; and replaces it by the powerful presence of the Holy Spirit when the person is born again (Romans 8:15-16).  The 19th century Scottish pastor, Thomas Chalmers, wrote about 'The Expulsive Power of a New Affection'.  He meant that when Jesus Christ is welcomed, Satan's agents must go away and never return.  That is such a simple message to give, "Welcome Jesus, You are welcome to come and fill my soul, and You are welcome to stay".

Prayer 
Almighty God. Thank You that Jesus has the authority to deal with every form of wickedness, as the light banishes the darkness. I am sorry when I might have cowered under the lying authority of Satan instead of welcoming the grace of Christ. Please help to ensure that I never allow a spiritual vacuum in my life; may I keep close to Jesus, reading the Word and obeying so that I do not grieve the Holy Spirit. And help me to be bold with my friends, encouraging them to welcome Jesus wholeheartedly and give no space to the devil. In Jesus' Name. Amen.
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