Pope Shenouda III
  
 Train yourself to  continue praying, whenever you want to end it...
  It is a sign  of success in praying that  you feel you cannot live without it or leave  it; it is as if you are  communicating direct with God, saying, “Stay  with me, my Lord.” And you  say with the  Shulamite in the Book of Songs, “I held Him and would  not let Him go” (Song 3:4)..  You will even feel the  sweetness of each petition or word and you  would not like to leave it.  Or, as one of the fathers said about the  prayers of the saints,  “Because of the sweetness of the word in their  mouth, they were unable  to leave it for another word...”...”