When has one penetrated
& arrived at True Wisdom?

Once, a certain not very well-known Bhikkhu asked the Blessed
Buddha:
Venerable Sir:
True Wisdom is it said. What is really True Wisdom?
Venerable Sir: When has one arrived at such true Wisdom?
The Blessed Gotama
Buddha then pointed out:
Understanding and knowing that: This is
Suffering is True Wisdom;
Understanding that:
Craving is the Cause of Suffering is True Wisdom;
Understanding that:
No Craving is the End of Suffering is True Wisdom;
Understanding that:
The
Noble 8-fold Way ends Suffering is True Wisdom!
All this profound understanding and direct knowledge of the absolute
is
True Wisdom, and it is by that very penetrating comprehension, that glimpse
of a far-reaching ultimate reality, that one has arrived at
this true Wisdom!
Therefore, Bhikkhu, an effort should be made much of
now
to understand:
This
is Suffering; an effort should be made much of now to comprehend:
This is the Cause of Suffering; an effort should be made
now so to realize:
This is the End of Suffering; An effort should be made
now to penetrate,
recognize, and develop,
This is the Way leading to the End of Suffering..

Source
(edited extract):
The Grouped Sayings of the Buddha. Samyutta Nikaya.
[V:429-30]
section 56: Saccasamyutta. Thread 18: True Wisdom...
More on these 4 Noble Truths
(Cattari Ariya Saccani):
https://What-Buddha-Said.net/drops/IV/Ignorance.htm
https://What-Buddha-Said.net/drops/IV/Clustered_Truths.htm
https://What-Buddha-Said.net/drops/IV/The_Ultimate_Fact.htm
https://What-Buddha-Said.net/drops/II/The_4_Noble_Truths.htm
https://What-Buddha-Said.net/drops/IV/Sour_Sense_Sources.htm
https://What-Buddha-Said.net/drops/II/The_1st_Noble_Truth_on_Suffering.htm
https://What-Buddha-Said.net/drops/II/The_2nd_Noble_Truth_on_The_Cause_of_Suffering.htm
https://What-Buddha-Said.net/drops/II/The_3rd_Noble_Truth_on_The_Ceasing_of_Suffering.htm
https://What-Buddha-Said.net/drops/II/The_4th_Noble_Truth_on_The_Way_to_End_Suffering.htm
