One day, Chang-sha Ching-tsen (d. 868), one of the well-known Chinese Ch'an masters, wandered in the mountain. When he was back just at the gate of the temple, the head monk asked him:
-Where have you been, Sir?
Chang-sha replied:
-I...
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to the group in the Deer Park near Varanasi, the Buddha spoke of the Four Noble Truths. The Four Noble Truths sum up, in a systematic formula, the central teaching of the Buddha.