Nine in the fifth place means

In dealing with weeds,

Firm resolution is necessary.

Walking in the middle

Remains free of blame.

Weeds always grow back again and are difficult to exterminate. So too the struggle against an inferior man in a high position demands firm resolution. One has certain relations with him, hence there is danger that one may give up the struggle as hopeless. But this must not be. One must go on resolutely and not allow himself to be deflected from his course. Only in this way does one remain free of blame.