He is said to have taught the doctrine of non-action (akiriya), denying the result of good or bad actions (D.i.52 f); probably the more correct description of Kassapa's teaching would be niskriyavāda - i.e., an affirmation that the soul is passive, unaffected by the good or the bad done by us, the ultimate reality lying beyond good or evil.
Elsewhere (S.iii.69; v.126), however, he is mentioned as an ahetuvādin, denying hetupaccaya (condition and cause - i.e., the efficacy of kamma), which teaching, in the Sāmaññaphala Sutta (D.i.53; see also A.iii.383, where the teaching of Chalabhijātiyo is also attributed to Pūrana), is attributed to Makkhali Gosāla.
The SNA (372) calls him an ājīvaka) that Pūrana Kassapa came by his name from the fact that as a result of his birth the number of slaves in a certain household reached one hundred. Owing to this fact he was never found fault with, even when he failed to do his work satisfactorily. But, in spite of this, he was dissatisfied and fled from his masters.
Pūrana Kassapa was among them, and in the course of his flight, he came across one of his followers, a farmer, who was on his way to see him, carrying a vessel of broth and a rope. Pūrana took the vessel and the rope, and going to the banks of the river near Sāvatthi, tied the vessel round his neck and threw himself into the stream.
There was a circle of bubbles on the water and Pūrana was reborn in Avīci. The Milindapañha (p. 4 f) also mentions a Pūrana Kassapa, contemporary with Milinda. This perhaps refers to a teacher descended from the same school who is credited with the view that the earth rules or sustains the world. v.l. Purāna.
- For a different version see Rockhill: op. cit., 80. According to this legend, Kassapa must have died in the sixteenth year of the Buddha's ministry. This is hardly reconcilable with the statement that Ajātasattu consulted him.