Friends:

 A most Profound and Wisely Ballanced Ontology:
 

          Buddha once explained existence as a chain of dependent emergence thus:

Some recluses and priests declare these excessively speculative views:
"Everything Exists"; which is the one extreme (Sarvastavadin Eternalism...).
Other recluses and priests declare a just as far fetched opposite extreme
view: "Everything does Not Exist" (Sunyatavadin Annihilationism...).
Avoiding both these extremes the Well-Gone-Beyond Buddha teaches
this Dhamma from the subtle, exquisite, and profound middle:

When this is present, that also exists.
When this emerges, that also arises.
When this is absent, that neither exists.
When this ceases, that also vanishes.

From ignorance arises mental construction.
From mental construction arises consciousness.
From consciousness arises naming-&-forming.
From name-&-form arises the six senses.
From the six senses arises contact.
From contact arises feeling.
From feeling arises craving.
From craving arises clinging.
From clinging arises becoming.
From becoming arises birth.
From birth arises ageing, decay, sickness and death.
From ageing, decay and death arises Suffering..
This is the origin of this entire mass of
frustrating Pain...
When ignorance ceases, mental construction stops.
When mental construction ceases, consciousness stops.
When consciousness ceases, naming-&-forming stops.
When name-&-form ceases, the six senses stops.
When the six senses ceases, contact stops.
When contact ceases, feeling stops.
When feeling ceases, craving stops.
When craving ceases, clinging stops.
When clinging ceases, becoming stops.
When becoming ceases, birth stops.
When birth ceases, ageing, decay, and death stops... !
When ageing, decay and death ceases, then Suffering  stops!
This is the disappearance of this entire mass of
frustrating Pain...
This - only this supremely stilled silence - is the deathless Nibbāna!




Everything has a Cause:
More on Co-Dependent Co-Arising (paticca-samuppāda):
https://What-Buddha-Said.net/drops/IV/Caused_by_What.htm
https://What-Buddha-Said.net/drops/Cohesive_Co-Origination.htm
https://What-Buddha-Said.net/drops/Collapsible_Co-Cessation.htm
https://What-Buddha-Said.net/drops/III/Causes_of_Emergence.htm

https://What-Buddha-Said.net/library/DPPN/wtb/n_r/paticca_samuppaada.htm


Existence is dynamic thus:
Neither a static substance out there, nor a mental illusion in here,
But a chain of dependent states arising and ceasing momentarily...

More on Buddhist Ontology: What exists and how does it exist?
https://What-Buddha-Said.net/drops/What_Exists.htm
https://What-Buddha-Said.net/drops/Advanced_Right_View.htm

Everything has a Cause..