The Twin Truths won by keen Dual Consideration:

The blessed Buddha once said:
Friends, the first consideration is:
Whatever Suffering arises, it does so
caused by Consciousness!
Another consequent and subsequent consideration is:
By ending Consciousness,
there cannot ever arise any Suffering!
Knowing this danger: All Suffering
emerges due to Consciousness, and
by
stopping consciousness, there cannot therefore ever be any pain!, any
with
intelligence would quench his craving, and latent urge for being
conscious...
Considering these twin truths cautiously, resolutely
and enthusiastically,
one may either enter the state of Nibbāna right here
and now, in this life,
or if there is lasting traces of clinging left, the state of a
non-returner...
Those who neglect
the understanding of consciousness itself, the cause of
consciousness, the end of consciousness,
and how consciousness is completely
eliminated, are
incapable of
release by
understanding, are thus incapable
of mental release,
are incapable
of direct
knowledge, and are thereby also
incapable of making
an end...They repeat
birth, ageing, decay, sickness, and
death ever again! While those who
undertake understanding of Consciousness,
Origin, End and Way, are quite capable of mental release by understanding,
and capable of making an end... They are
indeed near the deathless dimension!

On
the early Buddhist definition of Consciousness (viññāna):
https://What-Buddha-Said.net/drops/V/Momentary_Consciousness.htm
https://What-Buddha-Said.net/drops/IV/What_is_Consciousness.htm
https://What-Buddha-Said.net/library/DPPN/wtb/u_v/vinnaana.htm
https://What-Buddha-Said.net/drops/III/The_Selfless_Camera.htm
https://What-Buddha-Said.net/drops/V/Consciousness.htm
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
http://www.accesstoinsight.org/canon/khuddaka/suttaNipāta/index.html
https://What-Buddha-Said.net/library/ati_website/html/tipitaka/kn/snp/index.html