The details about "one's cultivation through the endeavors to engage and disengage one's body, mind and words" may differ from one guru to another. But the direction for "cultivation towards the object of priti or affection" (Krishna) is the primary objective of anyone in the position of guru. Thus the encouragement for a particular service that we may receive from one guru may differ from what we receive from another. But, still,their aim is always one - to see their dependant advance along the path of saranagati. Without a clear vision of this ultimate goal, the impetus for service will become disoriented.
Collected Letters to Friends and disciples Vol 4, Pg 133, 3rd paragraph.