The ego is the embryo from which the bheda of duality emerges. Until the ego is annihilated by Devi’s grace, the saadhak remains chained in the “triputibheda” which is the difference of perception of the knower, act of knowing, and the known. Sadhana and grace bring one to the slow fading of the ego which then finds it impossible to differentiate between these 3 and arrives at the amalgamation point/Bindu of true Advaita.