The Correct Meaning states: This explains the name and virtues of the hexagram: in the success of After Completion, even small matters must all succeed. By merely citing small matters, the great can be known; this is why it is After Completion.
For the phrasing to be fully complete, there should be another character 'small' (xiao), but since it echoes the classic text, it is sufficiently clear in brief, so it follows the abbreviated form.
The Correct Meaning states: This explains 'favorable to be steadfast and upright' by reference to lines Two, Three, Four, and Five all attaining correctness. When firm and yielding are all upright, evil cannot operate; therefore, only when upright is it favorable to be steadfast.
The Correct Meaning states: Regarding 'Initial good fortune, because the yielding attains the Central Position': this explains 'initial good fortune' in terms of Six in the Second Place occupying the middle as a yielding line.
If even the yielding and small attains the middle, then the principles of the firm and great all obtain completion. When nothing fails to be completed, there is good fortune; hence it is said, 'initial good fortune.'
As for 'Halting at the end brings disorder, for its Dao is exhausted': this specifically explains the warning. If one can advance and cultivate without halting, After Completion will have no disastrous end.
The ultimate disorder of After Completion arises because halting brings disorder. When halting at the end brings disorder, the Dao of After Completion has reached its exhaustion; hence it is said, 'Halting at the end brings disorder, for its Dao is exhausted.'