Riddles start some where!!!!!

he was a philosopher so he took a good look at himself in the mirror and decided to think his way out

with what he saw in the mirror he cut himself in two

the two halves made a whole

he pushed himself wholly beyond the epistemological boundaries

found it not to his liking and returned inside

He climbed out the top

He looked in the mirror to see what he SAW
he took the saw cut the table in half
two halves make a WHOLE
he crawled the the hole.
the end.

easy. he just walks out. cause there's no wall either

It had no door so he just walked out of the gap where the door should be.