28.  the  bow  . . .  in  . . .  rain--the  symbol  of  the  sure covenant of
  mercy  to  God's children remembered  amidst  judgments  on  the  wicked;  as
  in  the  flood  in  Noah's  days  
  (Re  4:3).
  "Like  hanging  out  from  the throne of  the  Eternal  a  fing  of  peace,  
  assuring  all  that  the  purpose  of Heaven was  to  preserve  rather  than  to  
  destroy.  Even  if  the  divine  work  should  require  a deluge of  wrath,  
  still  the  faithfulness  of  God  would  only  shine  forth  the  more  brightly  
  at  last  to  the  children  of  promise,  in  consequence  of  the  
  tribulations  needed  to  prepare  for  the  ultimate  good"  [FAIRBAIRN].
  (Isa  54:8-10).
  
         
  I  fell  upon  . . .  face--the  right  attitude,  spiritually,  before  we
  enter  on  any  active  work  for  God  
  (Eze  2:2;  3:23,  24;
  Re  1:17).  
  In  this  first  chapter  God  gathered  into  one vision the  substance  of  all
  that  was  to  occupy  the  prophetic  agency  of  Ezekiel;  as  was  done  
  afterwards  in  the  opening  vision  of  the Revelation of Saint John.
JFB.
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