This eternal movement he pictures elsewhere as an eternal strife of
opposites, whose differences nevertheless consummate themselves in finest
harmony. Thus oneness emerges out of multiplicity, multiplicity out of
oneness; and the harmony of the universe is of contraries, as of the lyre
and the bow. War is the father and king and lord of all things.
Neither god nor man presided at the creation of anything that is; that which
was, is that which is, and that which ever shall be; even an ever-living
Fire, ever kindling and ever being extinguished.
Thus in Fire, as an image or symbol of the underlying reality of
existence, Heraclitus advanced to the furthest limit attainable on physical
lines, for the expression of its essentially motive character. That
this Fire was no more than a symbol, suggested by the special
characteristics of fire in nature,—its subtlety, its mobility, its power of
penetrating all things and devouring all things, its powers for beneficence
in the warmth of living bodies and the life-giving power of the sun,—is seen
in the fact that he readily varies his expression for this principle,
calling it at times the Thunderbolt, at others the eternal Reason, or Law,
or Fate.