6.
The Discourse on Concentration
99.
"Monks, develop concentration.
A concentrated monk, monks, understands as it really is.
And what does he understand as it really is?
He understands as it really is: 'The eye is impermanent';
he understands as it really is: 'Forms are impermanent';
he understands as it really is: 'Eye-consciousness is impermanent';
he understands as it really is: 'Eye-contact is impermanent'.
He understands as it really is: 'Whatever feeling arises with eye-contact as condition - whether pleasant or unpleasant or neither-unpleasant-nor-pleasant - that too is impermanent'. Etc.
He understands as it really is: 'The mind is impermanent'.
Mental phenomena...
Mind-consciousness...
Mind-contact...
He understands as it really is: 'Whatever feeling arises with mind-contact as condition - whether pleasant or unpleasant or neither-unpleasant-nor-pleasant - that too is impermanent'.
Monks, develop concentration.
A concentrated monk, monks, understands as it really is."
The sixth.