At Sāvatthī. “What do you think, Rāhula? Are sights permanent or impermanent?” “Impermanent, sir.” … “… sounds … smells … tastes … touches … Are thoughts permanent or impermanent?” “Impermanent, sir.” … “Seeing this, a learned noble disciple becomes disillusioned with sights, sounds, smells, tastes, touches, and thoughts. Being disillusioned they become dispassionate. …”