I wake up from sleep mid-conversation all the time. Needless to say, there is a lot going on in sleep that we aren't aware of.

The soul is very active when we sleep and the mind takes a back seat. Sorry if that doesn't fit your belief. But, there is definitely a lot of inner activity going on during sleep.

Just a dream? Yeah, they keep telling us that

My best advice is to be as observational as you can. Try to be aware of as much as you can while in this state. Ask questions, remember the answers. You'll learn scores about yourself.