Just like a king is there, and he has got all kinds of officers with him, but some officer is engaged in the government house. Other officers, they are engaged outside the government house. The officers who have got engagement outside the government house they may be sitting with Kṛṣṇa, may be sitting with the governor or the king, but he has no business within the government house. In the government house there is a particular secretary, particular man in charge.
Similarly, in the spiritual world, the energy which is working, that is called yogamāyā. And in the material world, the energy which is working, that is called mahāmāyā. So Subhadrā is... Viṣṇu-śaktiḥ parā proktā (CC Madhya 6.154). Actually, Kṛṣṇa's energy is spiritual. That is not material.