Four metaphors
The four metaphors 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