Sattisutta
Sāvatthiyaṁ viharati. “Seyyathāpi, bhikkhave, satti tiṇhaphalā. Atha puriso āgaccheyya: ‘ahaṁ imaṁ sattiṁ tiṇhaphalaṁ pāṇinā vā muṭṭhinā vā paṭileṇissāmi paṭikoṭṭissāmi paṭivaṭṭessāmī’ti. Taṁ kiṁ maññatha, bhikkhave, bhabbo nu kho so puriso amuṁ sattiṁ tiṇhaphalaṁ pāṇinā vā muṭṭhinā vā paṭileṇetuṁ paṭikoṭṭetuṁ paṭivaṭṭetun”ti? “No hetaṁ, bhante”. “Taṁ kissa hetu”? “Asu hi, bhante, satti tiṇhaphalā na sukarā pāṇinā vā muṭṭhinā vā paṭileṇetuṁ paṭikoṭṭetuṁ paṭivaṭṭetuṁ. Yāvadeva ca pana so puriso kilamathassa vighātassa bhāgī assā”ti.
A Spear
At Sāvatthī. “Mendicants, suppose there was a sharp-pointed spear. And a man came along and thought, ‘With my hand or fist I’ll fold this sharp spear over, crumple it, and bend it back!’ What do you think, mendicants? Is that man capable of doing so?” “No, sir. Why not? Because it’s not easy to fold that sharp spear over, crumple it, and bend it back with the hand or fist. That man will eventually get weary and frustrated.”