a yellow square, indicating this line as the constituting ruler of the hexagram Six in the third place means:

A one-eyed man is able to see,
A lame man is able to tread.
He treads on the tail of the tiger.
The tiger bites the man.
Thus does a warrior act on behalf of his great prince.

A one-eyed man can indeed see, but not enough for clear vision. A lame man can indeed treat, but not enough to make progress. If in spite of such defects a man considers himself strong and consequently exposes himself to danger, he is inviting disaster, for he is undertaking something beyond his strength. This reckless way of plunging ahead, regardless of the adequacy of one's powers, can be justified only in the case of a warrior battling for his prince.