Nine resides at the beginning, the lowest position without rank, imaging the common people who receive punishment. At the inception of employing punishment, the crime is minor and the penalty is light. Jiao is a wooden instrument (stocks/fetters).
Because the fault is small, it is put upon the feet so as to cover and hurt the toes. When a person commits a small fault, putting him in stocks so as to cover his toes will cause him to feel dread and not dare advance into evil; therefore he attains freedom from blame.
The Great Treatise says: "A small penalty brings a great warning; this is good fortune for the petty person." This means that being warned at a minor level and at the very beginning brings freedom from blame.
The initial and top lines have no rank and represent those who receive punishment; the remaining four lines all represent those who administer punishment.
The initial line resides at the lowest without rank; the top line resides above the honored position, exceeding it, and thus likewise has no rank. Wang Bi considered them to have no yin or yang position; but yin and yang are tied to odd and even numbers—how could they be absent?
However, the reason the initial and top lines of various hexagrams do not speak of correct or incorrect position is that the meaning of beginning and end is paramount.
In Lin (Approach), Nine at the Beginning takes position as correct; whereas in Waiting (Xū), Six at the top is said to be not in correct position; and in The Creative (Heaven), Nine at the top is said to have no position—this refers to the position of rank and nobility, not the position of yin and yang.