One who does not understand aging and death is no true ascetic.So I have heard. At one time the Buddha was staying near Sāvatthī in Jeta’s Grove, Anāthapiṇḍika’s monastery. “Mendicants, there are ascetics and brahmins who don’t understand old age and death, their origin, their cessation, and the practice that leads to their cessation. I don’t regard them as true ascetics and brahmins. Those venerables don’t realize the goal of life as an ascetic or brahmin, and don’t live having realized it with their own insight. There are ascetics and brahmins who do understand old age and death, their origin, their cessation, and the practice that leads to their cessation. I regard them as true ascetics and brahmins. Those venerables realize the goal of life as an ascetic or brahmin, and live having realized it with their own insight.”