Buddha Abhidhamma - Ultimate Science - BuddhaNet

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1 Anattànupassana is Su¤¤ata-vimokkha-mukha.
It realizes that the nàma-råpa formations are void of ‘atta’
or ‘self’ or ‘ego’. Su¤¤ata refers to ‘void of atta.’
2 Aniccànupassana is Animitta-vimokkha-mukha.
It understands that the nàma-råpa formations are
formless, signless or imageless. Animitta refers to
signless state of nàma-råpa.
3 Dukkhànupassana is Appanihita-vimokkha-mukha.
It understands that the nàma-råpa formations are just
suffering or misery. So it develops no desire (taõhà) for
nàma-råpa formation. Appanihita refers to the state of
desirelessness.
In Visuddhi Magga (Chapter XXI, paragraph 70), the
following message is given:
1 “Whosoever being filled with determination (adhimokkha),
considers all formations as impermanent
(anicca), such a person attains the signless liberation.
2 “Whosoever being filled with tranquility, considers all
formations as painful (dukkha), such a person attains the
desireless liberation.
3 “Whosoever being filled with wisdom, considers all
formations as not-self (anatta), such a person attains the
void (su¤¤ata) liberation.
The Seven Stages of the Path of Purification
It is clearly stated in Mahà-satipaññhàna Sutta that the only way
towards absolute purity and extinction of all sufferings is the
Noble Eightfold Path (aññhaïgika-magga).
The eight constituents of the Path can be divided into three
groups called sikkhà (learning or training):