It was a good rule in their art, and that accompanies all other vain, fantastic, and supernatural arts, that the patient's belief should prepossess them with good hope and assurance of their effects and operation:
Haien antzean arau on bat zen, lantze ameskari, hutsal eta naturagaindiko guztiak laguntzen baititu, behar dela pairalearen fedeak aitzin dezan, esperantza eta segurantza onean, beren ondorioa eta ekintza.