The Buddha realises that Rāhula is
possessed of the qualities necessary to Deliverance and goes with him to
Andhavana for the siesta. There the Buddha demonstrates, by means of question
and answer, that all things are impermanent, and impresses on Rāhula the manner
in which the disciples of the Ariyans should strive to be delivered from them.
Rāhula takes the lesson to heart, and even as it is being delivered attains to
arahantship. (M.iii.277f; this sutta is also found at S. iv.105ff, where it is
called the Rāhula Sutta).
Many thousands of devas are present at
the preaching of the sermon, and this sutta is therefore given as an
illustration of the Buddha's great compassion (E.g., UdA.324; MA.i320; also
Mil.20). Among the suttas specially preached to Rāhula, this one emphasises
vipassanā (AA.ii.547). It may have been the incidents mentioned in this sutta
that were illustrated in the relic-chamber of the Mahā Thūpa. See Mhv.xxx.83.