Hazrat Inayat Khan several times recounted the following tale.
There is a story told of a dervish, a simple man who was initiated by a teacher. After the teacher had passed away, this man came into contact with a clairvoyant, who asked if he had guidance on the path.
This man replied, “Yes, my master, who passed from this earth. When he was still alive I enjoyed his guidance for some time, so the only thing I would want now is just your blessing.”
But the clairvoyant said, “I see by my clairvoyant power that the teacher who has passed away was not a true teacher.”
When the simple man heard this he would not allow himself to be angry with the other, but he said gently, “This teacher of mine may be false, but my faith is not false, and that is sufficient.”