To get an idea of what I'm talking about one may pay close attention to their own thought process. It may become evident that one can gain awareness of certain conceptual assemblages. If awareness at this level is sustained one would (very quickly) learn that thinking in this manner happens at an exceedingly rapid rate.
Such an assemblage is what we would commonly call an "idea". They may or may not be translatable into natural language, but doing so (mentally) takes noticeably more time so that thinking the same thoughts takes more time. Furthermore actually speaking a thought takes longer still.
One gets the impression of a hierarchy of levels at which thinking can occur. The manifest trade off being between categorical richness of expression and speed. Though I've expressed only three tiers there may be more or even a continuum, for instance where particular words start to enter the train at different levels.
So I'm talking about ideas before they become words.
Question: Is there any literature about thinking in less concrete modes