The Secret of the Veda
Agni for the ordinary worshipper may have meant simply the god of the Vedic fire, or it may have meant the principle of Heat and Light in physical Nature, or to the most ignorant it may have meant simply a superhuman personage, one of the many "givers of wealth", satisfiers of human desire. How suggest to those capable of a deeper conception the psychological functions of the God? The word itself fulfilled that service. For Agni meant the Strong, it meant the Bright, or even Force, Brilliance. So it could easily recall to the initiated, wherever it occurred, the idea of the illumined Energy which builds up the worlds ...
         The names of the gods in their very meaning recall that they are only epithets, significant names, descriptions, not personal appellations. -p52