The Twin Truths won by Dual Consideration:

The blessed Buddha once said:
Friends, the first consideration is:
Whatever Suffering arises, all that is
caused by Mental Construction!
The consequent second consideration is:
Stilling of all Mental
Construction, thereby ceases all Suffering completely!
Knowing this danger: -
All Suffering
is caused by Mental Construction -,
by silencing all experience,
sensation and feeling, the wise escapes all Suffering!
Considering these twin truths cautiously, resolutely
and enthusiastically,
one may
either enter the state of Nibbāna right here and now in this
very life, or if there is
remaining traces of clinging left, the state of a non-returner. Those who neglect
understanding of
mental construction, the origin of mental construction,
the end
of mental construction,
and how mental construction is irreversibly eliminated,
are
incapable of
release by understanding,
are incapable of total mental release,
are incapable
of direct knowledge, and
are thereby incapable of making
an end...
They repeat birth, ageing, decay,
sickness and death ever again...
While those who
undertake understanding
of Mental Construction, Origin, End and Way, indeed
are capable of mental release by understanding by reaching assured certainty,
and thus capable of making an end...
They are near the deathless dimension!

More on
Mental Construction
(Sankhāra):
https://What-Buddha-Said.net/library/DPPN/wtb/s_t/sankhaara.htm
On Stilling and
Ceasing of all Mental Construction
(Nirodha):
Stilled_but_not_Dead,
Ceasing,
9_Stillings,
Experiencing_Ceasing
On the
Dual Consideration of the Twin Truths:
https://What-Buddha-Said.net/drops/The_Rhinocero's_Horns_1.htm
https://What-Buddha-Said.net/drops/The_Rhinocero's_Horns_2.htm
https://What-Buddha-Said.net/drops/The_Rhinocero's_Horns_3.htm
https://What-Buddha-Said.net/drops/The_Rhinocero's_Horns_4.htm
https://What-Buddha-Said.net/drops/The_Rhinocero's_Horns_5.htm
https://What-Buddha-Said.net/drops/The_Rhinocero's_Horns_6.htm
https://What-Buddha-Said.net/drops/The_Rhinocero's_Horns_7.htm


Source: The Bundle of Threads. The
Sutta-Nipāta 724-765
https://What-Buddha-Said.net/library/ati_website/html/tipitaka/kn/snp/index.html