Mundane potency

Srila Svarup Damodar Prabhu has explained that Krishna’s power is classified in three manifestations: first is chit-sakti [ transcendental potency ], the second is jada-sakti [ mundane potency ], and the third is where the first two come very close to each other, and that is called tatastha-sakti. First is light, second is shadow, and third is the position midway between the two.

— books Affectionate Guidance / Section 1. Siddhanta / Chapter 12. Our Lord’s Beloved Power