Nine at the beginning means:

Going quickly when one's tasks are finished
Is without blame.
But one must reflect on how much one may decrease others.


It is unselfish and good when a man, after completing his own urgent tasks, uses his strength in the service of others, and without bragging or making much of it, helps quickly where help is needed. But the man in a superior position who is thus aided must weigh carefully how much he can accept without doing the helpful servant or friend real harm. Only where such delicacy of feeling exists can one give oneself unconditionally and without hesitation.