Six in the second place corresponds to the fifth; it contemplates the fifth. The dao of the fifth—firm, yang, central, and correct—is not something that the dim, yin, yielding, and weak second line can clearly behold; therefore, it is merely like viewing through a peep.
A peeping view, though catching a small glimpse, cannot see very clearly.
Since the second line cannot clearly see the firm, yang, central, and correct dao, it is advantageous for it to be like a woman's perseverance: though she cannot see very clearly, she is able to follow and obey, which is the way of a woman; in a woman, this constitutes perseverance.
Since the second line cannot clearly see the dao of Nine in the fifth place, if it can follow and obey like a woman, it will not lose its Central Position and correctness, and this is what makes it advantageous.