I believe when you're able to read your thoughts, you're subconsciously feeling them.
To start off, all of the five senses are feeling in some way.
Touching = feeling
Tasting = feeling, but picking up different things than normal touching
Smelling = feeling the particles
Hearing = feeling the vibrations
Seeing = feeling vibrations, but different vibrations than hearing
I think that humans subconsciously feel their brain from the inside and that's how we're able to read our own thoughts, but some are unreadable, which is the subconscious.
If it's true, this leads to something else, which is that if you subconsciously feel another part of your body like your gut, what data do you get from it?
