(Kadamba Kanana Swami, 28 April 2013, Radhadesh, Belgium, Vyasa Puja, Questions and answers)
Relationships that are of a deep nature between vaishnavas, that are affecting one’s entire spiritual life and that have a binding effect on one’s spiritual life – such relationships can develop into diksha or siksha-guru type of relationships.
There’s incidental siksha – maybe some senior vaishnava gives some instruction. We have faith in it, take it, but for the rest, it doesn’t affect our life.
Those relationships that have a deep, lasting effect on our lives, such relationships can go on eternally after this life, whether diksha or siksha. Therefore, one can have many gurus. Once we arrive in the spiritual world, we may find that there are many gurus who have somewhere along the line, been part of our lives and we remain indebted to them, eternally so. The indebtedness is never paid off!