Ah! Metaphysics

Ah! metaphysics!
such a rickety bridge
a bridge to great wonders
beyond yonder ridge

But beware of the danger
when booking this trip
terra incognita
can be cradle or crypt

No! don't look down
traversing betwixt
precept to precept
keep eyes wide and fixed

It's a trick and a half
just to make it across
many quizzics have
many more are lost

but the truest of tricks
in this foolhearty game
is the rickety return
on that bridge whence you came