Separation of Guru is one of the most painful, not simply a personal separation, but it effects the collective of devotees. Who will be the next acarya? The next mahabhagavata? What to do? So many questions and doubts arise. Here is a quote from nitya-lila pravista Srila Bhakti Raksaka Sridhara Maharaja regarding this:
“The guru should be recognized by impartial judgment. Everyone thinks that his own mother is the most affectionate. But when a comparison is drawn between two mothers to see who is more affectionate, an impartial criterion will be applied. This is called tatastha vicara, an impartial comparison of relative and absolute considerations. When the two are weighed, the absolute calculation will always have the greater value.
“The position of acarya is very intricate. It is very difficult to bring an acary under rule. You see, that is our practical experience. You please hear and note this. The position of an acarya is a relative thing, and the position of the disciple is also relative, just like the relationship between mother and child, father and son, wife and husband. Although to his godbrothers a guru will be seen in a relative position, to his disciple, the guru is absolute. So to adjust between the relative and absolute is a difficult thing; it is an eternal problem. Even in Krsna-lila there is ‘enmity’ between madhurya-rasa and vatsalya, but when the absolute consideration comes, both rasas must be included within the fold.” (Sri Guru and His Grace, p. 76)