[258] At Sāvatthī. In the park. "Bhikkhus, this saṃsāra is without discoverable beginning. A first point is not discerned of beings roaming and wandering on, hindered by ignorance (avijjā) and fettered by craving (taṇhā). Suppose, bhikkhus, a dog bound by a leash were tied to a strong post or pillar: if it walks, it walks right up close to that very post or pillar; if it stands, it stands right up close to that very post or pillar; if it sits, it sits right up close to that very post or pillar; if it lies down, it lies down right up close to that very post or pillar. Even so, bhikkhus, the uninstructed worldling regards form thus: 'This is mine, this I am, this is my self.' Feeling (vedanā) … perception … volitional formations … he regards consciousness thus: 'This is mine, this I am, this is my self.' If he walks, he walks right up close to these very five aggregates subject to clinging; if he stands, he stands right up close to these very five aggregates subject to clinging; if he sits, he sits right up close to these very five aggregates subject to clinging; if he lies down, he lies down right up close to these very five aggregates subject to clinging. Therefore, bhikkhus, one's own mind (citta) should be frequently reflected upon thus: 'For a long time this mind has been defiled by lust (rāga), by hatred, and by delusion.'"
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.