Friends:
How to reach the Certainty of Final Knowledge?
The Blessed Buddha once
said:
Bhikkhus, there are these
4 Foundations of Awareness.
What four? The ever calmly self reminding awareness of:
1: Body is just a mass
of disgusting impurities...
2: Feelings are only a repeating
emotional noise...
3: Mind is simply a conditioned set of weird moods...
4: Phenomena are mentally baked
& faked appearances...
While always acutely alert
and clearly comprehending, thereby removing all lust,
desire, envy, jealousy, frustration, & any kind of discontent rooted in this world...
When, Bhikkhus, these
4 Foundations
of Awareness have been developed, trained
& well established, one of two fruits may be expected:
Either
Final Knowledge in
this very life, or if there is residual clinging,
the exalted state of
Non-Return...!

Details On Four Foundations
of Awareness (Sati):
http://What-Buddha-Said.net/drops/III/Four_Foundations_of_Awareness.htm
http://What-Buddha-Said.net/drops/What_is_Right_Awareness.htm
http://What-Buddha-Said.net/drops/III/Awareness_Sati.htm

Awareness is Always Advantageous!
-
Sati Studies,
Sati_in_Solitude,
Noble_Awareness,
Awareness_Analysis,
-
Clear Comprehension,
Feeding_Awareness,
Enlightened_and_Awakening,
-
Sati_a_la_Anuruddha,
Accumulating_Advantage,
One_and_only_Way,
-
Careful_and_Rational_Attention,
Accumulation_of_Advantage,
-
Causes_of_Emergence,
Clear_and_Aware_Comprehension,
Desireless_is_Deathless,
Determining_Duration,
Sati_Summary,
Crucial_Foundation.

The 4 Great Frames of Reference!
Source of reference (edited extract):
The Grouped Sayings of the Buddha.
Samyutta Nikāya.
Book [V:
181] 47. Foundations of Awareness: 36 Final Knowledge..
Awareness of 4!