A man conversing in earnest, if he watch his intellectual processes, will find that a material image, more or less luminous, arises in his mind, cotemporaneous with every thought, which furnishes the vestment of the thought. Hence, good writing and brilliant discourse are perpetual allegories.
 Ralph Waldo Emerson, Nature (1836). copy citation

add
Author Ralph Waldo Emerson
Source Nature
Topic mind process
Date 1836
Language English
Reference
Note
Weblink https://en.wikisource.org/wiki/Nature,_Addresses_and_Lectures/Nature

Context

“so that picturesque language is at once a commanding certificate that he who employs it, is a man in alliance with truth and God. The moment our discourse rises above the ground line of familiar facts, and is inflamed with passion or exalted by thought, it clothes itself in images. A man conversing in earnest, if he watch his intellectual processes, will find that a material image, more or less luminous, arises in his mind, cotemporaneous with every thought, which furnishes the vestment of the thought. Hence, good writing and brilliant discourse are perpetual allegories. This imagery is spontaneous. It is the blending of experience with the present action of the mind. It is proper creation. It is the working of the Original Cause through the instruments he has already made.” source