Fire (spark) is reaction, produced by friction of two substances in negative and positive (opposite) directions. Fire seeks help of substance for its extension. It is the substance that helps fire to become furious. So intensity of fire depends on power of substances. Just Imagine, spark is bad economic & politicsl Governance and substance is poverty/inequality
(reaction, wisdom, economy,)
Earth poured upon fire smothers it, but earth poured upon earth covers more ground. Water added to water makes a fuller glass and fire added upon fire makes a bigger flame.