There is tremendous power and anointing on God's Word.  The Word is God speaking and it is alive and living and more powerful than a two-edged sword.  When you speak God's Word it is medicine and releases health in your physical body.  Proverbs 3:1-2 "My son, do not forget my teaching, but keep my commands in your heart, or they will prolong your life many years and bring you peace and prosperity." and verse 8 says "This will bring health to your body and nourishment to your bones."  God's Word will heal your body if you believe and know how to apply it.  A very wise Centurion in Luke 7 undersood the power and authority in God's Word.  This Centurion had a servant who was sick and about to die.  He had heard of Jesus and sent word that he wanted Him to come and heal his servant.  Right before Jesus was to arrive the Centurion sent this message to Jesus, "Lord, don’t trouble yourself, for I do not deserve to have you come under my roof. That is why I did not even consider myself worthy to come to you. But say the word, and my servant will be healed. For I myself am a man under authority, with soldiers under me. I tell this one, ‘Go,’ and he goes; and that one, ‘Come,’ and he comes. I say to my servant, ‘Do this,’ and he does it.”  This Cenutrion understood the power and authority of the spoken Word of God because he understood authority.  That when a person with authority gives a command in the natural that it is carried out and it's the same in the spiritual realm.  He believed that when the Words of Jesus were spoken that they would come to pass.  God's Word will heal you as much as the prayer of salvation will save you.  We must only believe!  God is not pleased with us when we doubt the credibility of His Word, by not trusting HIm enough to stand on His Word and run the devil off
.  We must learn how to use the Word of God as our sword against satan and his lying demons by saying to the lies, the pain, the symptoms.....IT IS WRITTEN!!!
  "By the stripes of Jesus, I am healed and you have no place in my body!" You must confess the Word without wavering in your faith
.  Base your healing confession on God’s Word and the enemy will not be able to deceive you
.  Faith is the substances of things hoped for and comes in the substance....you have to get the substance and YOUR SUBSTANCE IS GOD’S WORD!
 This is exercising your faith and using the authority of God’s Word that Jesus gave us to use against the enemies attacks Luke 10:19 says "We have all power against the power of the enemy"  If you do not know and exercise your authority...you will be deceived. 

So, speak the WORD ONLY and you will be walk in in GREAT FAITH as the Centurion and then you will be healed just like his servant!