Isn't moving to the past a big deal? You can change the past, you know!

You're returning to the future to pick up books sometimes, right?

Changes to the past didn't have any influence on the future, correct?

Present

Future

Became apprentice

No changes

Transformed the past

You said you interfered with the present (the past). But you aren't able to remake our future.

... Hmm-hmmm.

But then, what is "the past"?

The past is the past! Your olden days.

In other words, this place is...

... a potty?