Jesus Verse by Verse...
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8:3 Touched  him- All would’ve been shocked. Touching a leper made a person ritually  unclean, and risked contracting the illness. Jesus did this to show the extent  to which He did not believe in “guilt by association”. 
  8:16,17 ‘Demon possession’ was the language used in  the first century to describe mental illness. Note the parallel between  ‘casting out demons’ and being cured of disease. ‘Demons’ don’t in fact exist-  see the “Doctrinal Summary”.
  8:22 Jesus, the Lord of all grace, can at times be  very demanding. He wants our immediate response.  Likewise He exaggerated the situation in v. 21- He did often have somewhere to  sleep, e.g. the home of Martha and Mary, but that night perhaps He had nowhere. 
  8:23 His  disciples followed him- The impression is given of them walking behind Him.  They are symbols of us all. 
  8:25 Awoke Him-  Jesus surely only appeared to be sleeping, in a small boat about to sink. But  as in our lives, He appears silent only to bring us to the point of realizing  our desperation for Him. 
  8:25 O you of  little faith! – Remember the Gospel records were written by the disciples.  They are transcripts of their preaching to others. They appealed for others to  believe in Christ by pointing out how they had themselves been of such weak  belief in Christ. Such humility, recounting our failures to others, is what  makes our witness powerful rather than pretending we are perfect.  Self-righteousness turns people off.
  8:32 Jesus agreed to the mad man’s request in order  to provide him with a visual aide memoire for the rest of his life. Mental illness is usually intermittent, and the man  needed assurance that this time the cure was total. His illness may have been  caused from eating pig meat.