The answer to existence must have the following
ten characteristics: It must be

1. eternal
2. necessary
3. a priori (prior to any experience)
4. complete
5. consistent
6. maximally coherent
7. maximally stable
8. maximally analytic
9. maximally simple
10. maximally general

Only Ontological Mathematics qualifies. It is the unique solution to existence.
If mathematics is the Archetype of Order - order being the sine qua non for everything else - then the more conscious we become of this Archetype, the more we understand fundamental reality.

Total consciousness of the Order Archetype means total understanding of reality. That's what ontological mathematics yields. Ontological mathematics is the science of the Archetype of Order.

The development of mathematics reflects the progressive development of consciousness of order within the psyche, and its consequent ability to connect the the ultimate order of existence.