fire.

Meta. Fire is generally used in the Bible as a symbol of destruction of evil and error. It stands for cleansing and purification. In its true essence it is the fire of Spirit, or the divine energy, which never ceases its life-giving, purifying glow; when its cleansing work is completed in man's mind and body there is no more error to be consumed, and it then manifests in purified man as his eternal life. “Our God is a consuming fire” (Heb. 12:29; see Deut. 4:24; 9:3, and Isa. 33:14-16). Besides being “a consuming fire,” our God is Spirit, life, love, substance, power, intelligence, Truth.

Fire also represents the positive, affirmative state of mind, as opposed to the negative or watery state.