The Twin Truths won by keen Dual Consideration:

The blessed Buddha once said:
Friends, the first consideration is:
Whatever Suffering arises, all does so
caused by Contact!
Another consequent consideration is:
By stopping Contact,
there cannot ever arise any Suffering!
The fool immerses himself
in contact and suffers thereby, when it fades.
The wise by comprehending this inherent danger in any
contact withdraw,
by quenching his urge for contacting ever changing imprints of sensation...
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 understanding
of contact, the origin of contact,
the end
of contact, and how contact is completely eliminated,
are
thus incapable of
release by
understanding, are thus incapable of mental
release,
are thus
incapable
of direct
knowledge, and are thus incapable
of making
an end...
They repeat
birth, ageing, decay, sickness and death
ever again...
While those who
undertake understanding of contact,
Origin, End and Way,
are quite capable of mental release by understanding,
and capable of making
an end... They are near the deathless dimension!
On Contact
(Phassa):
https://What-Buddha-Said.net/drops/II/What_is_Contact.htm
https://What-Buddha-Said.net/drops/Diversity_of_Contacts.htm
https://What-Buddha-Said.net/library/DPPN/wtb/n_r/phassa.htm
https://What-Buddha-Said.net/drops/The_Rhinocero's_Horns_6.htm
https://What-Buddha-Said.net/drops/II/In_Dependence_on_Contact.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
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