Ok, well, I'll explain it to you.
Fire is the most destructive, wild, and virtually uncontrolable of the elements, probably tying with lightning. Fire requires control and awareness, else it will destroy all in sight and reach. Fire is a consumer as well, it does not simply hit its target, it devours them, as it does to the air. Weak against water and powerful against wind fire requires a powerful, but yet calm state of mind. Without a degree of calmness, fire will evade your control. Fire is both a source of life and death.
Understand?