Before I go to sleep

Something I am thinking about, but don't have figured out.

What purpose does "being in protection" (a UYO term) serve me?

I am aware it is happening. I put up the wall. I protect myself. But realistically from what?!

From what, except my own thoughts, do I have to protect myself from?

And with that... I leave you, for an attempt at a night's sleep with a head cold...