Twin Truths won by Dual Consideration:

Ignorance is
Not Knowing the 4 Noble Truths!
The blessed Buddha once said:
Friends, the first
clever consideration is:
Whatever
Suffering arises, this
Suffering is
caused by Ignorance!
Another consequent,
and subsequent consideration is:
Clearing all
Ignorance by
Understanding,
stops all arising of
any
Suffering!
This immensely long round of rebirth
with transition from now this, then to
that form,
is caused by this dreadfully deep
Ignorance alone! Those who
really understand this,
do not renew any return into any form of
being...
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,
win the state of
non-return...
Those who neglect
understanding of
Ignorance, the origin of
Ignorance,
the End of
Ignorance,
and how Ignorance is completely eliminated, are
incapable of
release by
Understanding, are incapable of mental release,
are incapable
of direct knowledge,
and are thereby incapable of making
an end...
They
will therefore repeat birth, ageing, decay, sickness,
and death ever again...
While those who do undertake
understanding of
Ignorance, Origin, End
and Way,
are indeed capable of mental release by
understanding, direct absolute knowledge,
and thus capable of making an end... They are
thus headed towards the Deathless!

More on this Deepest Root of all Evil:
Ignorance:
https://What-Buddha-Said.net/drops/IV/Ignorance.htm
https://What-Buddha-Said.net/drops/II/What_is_Ignorance.htm
https://What-Buddha-Said.net/drops/II/Cause_of_Ignorance.htm
https://What-Buddha-Said.net/drops/II/The_Causes_of_Ignorance.htm
https://What-Buddha-Said.net/drops/II/Indifference_Creates_Ignorance.htm
https://What-Buddha-Said.net/drops/IV/What_is_the_Cause_of_Ignorance.htm
https://What-Buddha-Said.net/drops/II/Because_of_Not_Knowing.htm
https://What-Buddha-Said.net/drops/II/Because_of_Not_Examining.htm
http://www.accesstoinsight.org/lib/authors/thanissaro/ignorance.html

Deeper than the eyes is the mental
Blindness of
Ignorance!
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