28-30.
The Discourse on External Past and So On as Impermanent
195-197.
"Forms, monks, are impermanent, past, future, present.
Sounds...
Odours...
Flavours...
Tangible objects...
Mental phenomena are impermanent, past, future, present.
Seeing thus, etc.
He understands: ... there is no more coming back to any state of being.'"