Nine at the beginning means:
Power in the toes.
Continuing brings misfortune.
This is certainly true.
The toes are in the lowest place and are ready to advance. So likewise great power in lowly station is inclined to effect advance by force. This, if carried further, would certainly lead to misfortune, and therefore by way of advice a warning is added.
Translator of this version of the I Ching is Richard Wilhelm. If you missed any posts in this series, please utilize the I Ching label below.