One of the most significant influences in this regard was the third- century philosopher Plotinus (pronounced plo-TYNE-us), who elaborated on several of Plato's ideas concerning metaphysics, or [1.] theories of the connections between what we see and what we can't see. His work expanding on the [2.] "ladder rungs" or levels [End of 2.] that lead from physical human experience to the realm of the pure soul was particularly influential for Christian and other religious doctrines.
[3.] Metaphysics describes the kind of philosophy that investigates "first principles" or the truths that must underlie existence. [End of 3.]
The author isn't a philosopher, but has a BA, MA, and PhD in English.
I accept 3 as a correct definition of metaphysics, but not 1.
- Doesn’t 3 differ from 2? How exactly is 3 related to 2 ('ladder rungs or levels’)?