How can one realize the Deathless Here and Now?

The Blessed Buddha once
said:
Bhikkhus, there are these
Four
Foundations of Awareness. What four?
When a Bhikkhu keenly contemplates:
1: The mere form within
all Body...
2: The mere reaction within all Feeling...
3: The
mere mood within all Mind...
4: The mental state within all Phenomena..
while always acutely aware
& clearly comprehending, he thereby removes
any
urge, envy, jealousy, frustration and discontent rooted in this world...
While contemplating the body as mere form, feeling as mere reaction, mind
as mere mood and all
phenomena as momentary mental states, whatever lust,
desire and craving
he has for any form, for any feeling, for any mentality, and
for whatever juicy phenomenon, that very desire is abandoned and eliminated
right there and then! When desire is eliminated, the
Deathless
dimension itself
is realized...

The 4 Frames of
Reference
Details
on these 4 Foundations
of Awareness (Sati):
https://What-Buddha-Said.net/drops/What_is_Right_Awareness.htm
https://What-Buddha-Said.net/drops/III/Awareness_Sati.htm

More on this dual
Desire
(Chanda):
https://What-Buddha-Said.net/drops/II/The_Fire_of_Sense-Desire.htm
https://What-Buddha-Said.net/drops/IV/Desire_as_Way_to_Force.htm
https://What-Buddha-Said.net/drops/II/Obstructing_Corruption.htm
https://What-Buddha-Said.net/drops/III/Desireless_is_Deathless.htm
https://What-Buddha-Said.net/drops/II/Two_kinds_of_Desire.htm
https://What-Buddha-Said.net/drops/II/Colourful_but_Muddy.htm
https://What-Buddha-Said.net/library/DPPN/wtb/b_f/chanda.htm
https://What-Buddha-Said.net/drops/II/The_Charcoal_Pit.htm
https://What-Buddha-Said.net/drops/II/Desire_&_Lust.htm
https://What-Buddha-Said.net/drops/II/Just_a_Flash.htm
https://What-Buddha-Said.net/drops/Why_Not.htm
Source of reference (edited extract):
The Grouped Sayings of the Buddha.
Samyutta Nikāya.
Book [V:
181-2] 47 The Foundations of Awareness: 37 Desire..
