Nine in the second place means

Not going out of the gate and the courtyard

Brings misfortune.

When the time for action has come, the moment must be quickly seized. Just as water first collects in a lake without flowing out, yet is certain to find an outlet when the lake is full, so it is in the life of man. It is a good thing to hesitate so long as the time for action has not come, but no longer. Once the obstacles to action have been removed, anxious hesitation is a mistake that is bound to bring disaster, because one misses one's opportunity.