Who Has Gotten Darshan Of All Sargun Forms Of The Satguru?

In this Katha clip, Bhai Daljeet Singh (Damdami Taksal wale) shares a story in which Sant Attar Singh Ji asks Sant Maggar Singh, in the presence of Sant Sundar Singh Ji, if anyone has ever had the darshan of the ten forms of Satguru. Later, Sant Attar Singh Ji guides Sant Sundar Singh Ji on how to achieve this vision.