12th C. Herbal Invocation

                           INVOCATION

 'Earth, divine Goddess, Mother Nature who generates all things
  and brings forth anew the sun which you have given to the nations;
  Guardian of sky and sea and of all gods and powers....through your
  power all nature falls silent and then sinks in sleep. And again
  you bring back the light and chase away night and yet again you
  cover us most securely with your shades. You do contain chaos
  infinite, yea and winds and showers and storms; you send them out
  when you will and cause the seas to roar; you chase away the sun
  and rouse the storm. Again when you will you send forth the joyous
  day and give the nourishment of life with your eternal surety; and
  when the soul departs to you we return. You are indeed duly called
  Great Mother of the Gods; you conquer by your divine name. You are
  the source of strength of nations and of gods, without you nothing
  can be brought to perfection or be born; you are Great Queen of the
  Gods. Goddess! I adore thee as divine; I call upon your name; be
  pleased the grant that which I ask of you, so shall I give thanks
  to thee, Goddess, with due faith.
   Hear, I beseech you, and be favorable to my prayer. Whatsoever
  herb your power does produce, give, I pray, with goodwill to all
  nations to save them and grant me this my medicine. Come to me with
  your powers, and howsoever I may use them, may they have good
  success to whosoever I may give them. Whatever you grant, may it
  prosper. To you all things return. Those who rightly receive these
  herbs from me, please make them whole. Goddess, I beseech you, I
  pray as a suppliant that by your majesty you grant this to me.
   Now I make intercession to you all your powers and herbs and to
  your majesty, you whom Earth parent of all has produced and given
  as a medicine of health to all nations and has put majesty upon
  you, I pray you, the greatest help to the human race. This I pray
  and beseech from you, be present here with your virtues, for She
  who created you has Herself promised that I may gather you into
  the goodwill of him on whom the art of medicine was bestowed, and
  grant for health's sake good medicine by grace of your powers. I
  pray grant me through your virtues that whatsoever is wrought by
  me through you may in all it's powers have good and speedy effect
  and good success and that I may always be permitted with the favor
  of your majesty to gather you into my hands and to glean your
  fruits. So shall I give thanks to you in the name of the majesty
  which ordained your birth.'

  (Modernized version of a 12th century
  herbalist spell. Original translation
  from 'Early English Magic and
  Medicine', by Dr. Charles Singer.
  Proceedings of the British Academy,
  Vol. IV )