system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How can our brain have an inner monologue or make us see images we can imagine?
gpt
Really complex and we ultimately don't know all of it.... to know this we would need to understand the hard problem of consciousness. 

We are dealing with the so far most complex natural structure in the universe here after all.

But what we do know is the inner monologue and the action of speaking to other people does kinda occupy the same brain circuits... so it has probably to do with the same circuit that also deal with facial recognition and general communication.. whereas imagining things has to do with our visual processing..  a big hint for this is daydreaming and dreaming itself happening with your eyes closed. Your visual system can chill... we do also know our brain uses eye blinks to kinda interpret time perception (source andrew hubermann) so we probably have lots of mechanisms to make our brain circuits shift around fast.

It is incredibly hard to speak to yourself in an inner monologue while speaking at the same time for instance.  Sure your brain can shift back and forth but as far as we know we cannot do the 2 at the same time.