Nine in the fourth place means:

Its coming is sudden;
It flames up, dies down, is thrown away.


Clarity of mind has the same relation to life that fire has to wood. Fire clings to wood, but also consumes it. Clarity of mind is rooted in life but can also consume it. Everything depends upon how the clarity functions. Here the image used is that of a meteor or a straw fire. A man who is excitable and restless may rise quickly to prominence but produces no lasting effects. Thus matters end badly when a man spends himself too rapidly and consumes himself like a meteor.