I can't really "see" anything either, but I'm assuming it's something akin to "hearing" your inner voice. I also don't actually "hear" anything, but I can tell

I can't really "see" anything either, but I'm assuming it's something akin to "hearing" your inner voice. I also don't actually "hear" anything, but I can tell that it's going on in my head and it's effortless and "automatic". I don't have to consciously exert effort to "activate it", imagine it, and keep it there.