more bs, Durga is not just Adi Parashakti but the Supreme in full, Tripura Sundari. She is the Shakti but she is Shaktimam as well, and pure Purusha. and one worships the Devi to both material and spiritual aims. (it is said that one worships Mahadeva to spiritual aims primarily, but in truth, one can pray to God for anything) also, "internal potency" is a silly construction, God has no inside and outside.