Need definitions of: Dark; Warm; and Bright

In the beginning God created the heaven and the earth. [2] And the earth was without form, and void; and darkness was upon the face of the deep. ... [5] And God called the light Day, and the darkness he called Night. And the evening and the morning were the first day.

Okay. Forget for the moment this is anything to do with religion. Consider only the sequence of events: formless void and darkness becomes night and day. How? By being called night and day. 

Take away words and all we have left is formless void. Audio terms like dark, warm and bright are tools we use to evaluate performance, find better components, and build a better system. Without them we are adrift in a formless void. Think about it. 

from pg 27:

Critical listening - the practice of evaluating the quality of audio equipment by careful analytical listening - is very different from listening for pleasure. The goal isn't to enjoy the musical experience, but to determine if a system or component sounds good or bad, and which specific characteristics [emphasis in original] of the sound make it good or bad. You want to critically examine what you're hearing so that you can form judgments about the reproduced sound. You can then use this information to evaluate and choose components, and to fine tune a system for greater musical enjoyment.