What happens to the Buddha or an Arahant after his death, Parinirvāṇa? This comes under the category of unanswered questions (avyākata). Even when the Buddha spoke about this, he indicated that no words in our vocabulary could express what happens to an Arahant after his death. In reply to a Parivrājaka named Vaccha, the Buddha said that terms like ‘born’ or ‘not born’ do not apply in the case of an Arahant, because those things—matter, sensation, perception, mental activities, consciousness—with which the terms like ‘born’ and ‘not born’ are associated, are completely destroyed and uprooted, never to rise again after his death.

An Arahant after his death is often compared to a fire gone out when the supply of wood is over, or to the flame of a lamp gone out when the wick and oil are finished. Here it should be clearly and distinctly understood, without any confusion, that what is compared to a flame or a fire gone out is not Nirvāṇa, but the ‘being’ composed of the Five Aggregates who realized Nirvāṇa. This point has to be emphasized because many people, even some great scholars, have misunderstood and misinterpreted this simile as referring to Nirvāṇa. Nirvāṇa is never compared to a fire or a lamp gone out.