Four metaphors
The four metaphors (Tib. འདུ་ཤེས་བཞི་, Wyl. du shes bzhi) explain the conduct to be adopted when listening to the teachings, and are given in the Gandavyuha Sutra (The Sutra Arranged Like a Tree, Tib. སྡོང་པོ་བཀོད་པའི་མདོ་ ), which is the final section of the Avatamsaka Sutra (The Flower Ornament Sutra, Tib. མདོ་མེ་ཏོག་རྣ་རྒྱན་ཕལ་པོ་ཆེ་ or simply, Tib. མདོ་ཕལ་པོ་ཆེ་).[1]
Noble one, think of yourself as someone who is sick,
Of the Dharma as the remedy,
Of your spiritual teacher as a skilful doctor,
And of diligent practice as the way to recovery.[2]
References
Further Reading
Patrul Rinpoche, The Words of My Perfect Teacher, translated by Padmakara Translation Group, ISBN 0-06-066449-5, pages 16-18