The material nature is one of the energies of the Lord, and she can work under the direction of the Lord (adhyaksena). When the Lord throws His transcendental glance over the material nature, then only can the material nature act, as a father contacts the mother, who is then able to conceive a child. Although it appears to the layman that the mother gives birth to the child, the experienced man knows that the father gives birth to the child. The material nature therefore produces the moving and standing manifestations of the material world after being contacted by the supreme father, and not independently. Considering material nature to be the cause of creation, maintenance, etc., is called "the logic of nipples on the neck of a goat." The Caitanya-caritamrta by Srila Krsnadasa Kaviraja Gosvami describes this logic of aja-gala-stana-nyaya as follows (as explained by His Divine Grace Sri Srimad Bhaktisiddhanta Sarasvati Gosvami Maharaja): "The material nature, as the material cause, is known as pradhana, and as efficient cause is known as maya. But since it is inert matter, it is not the remote cause of creation." Kaviraja Gosvami states as follows:

Because Karanarnavasayi Visnu is a plenary expansion of Krsna, it is He who electrifies the matter to put it in motion. The example of electrification is quite appropriate. A piece of iron is certainly not fire, but when the iron is made red-hot, certainly it has the quality of fire through its burning capacity. Matter is compared to the piece of iron, and it is electrified or made red-hot by the glance or manipulation of the supreme consciousness of Visnu. Only by such electrification is the energy of matter displayed in various actions and reactions. Therefore the inert matter is neither efficient nor the material cause of the cosmic manifestation. Sri Kapiladeva has said:

The original fire, its flame, its sparks and its smoke are all one, for fire is still fire yet is different from the flame, flame is different from sparks, and sparks are different from the smoke. In every one of them, namely in the flames, in the sparks and in the smoke, the integrity of fire is present, yet all of them are differently situated with different positions. The cosmic manifestation is compared to the smoke because when smoke passes over the sky so many forms appear, resembling many known and unknown manifestations. The sparks are compared to living entities, and the flames are compared to material nature (pradhana). One must know that each and every one of them is effective simply because of being empowered by the quality of the original fire. Therefore all of them, namely the material nature, the cosmic manifestation and the living entities, are but different energies of the Lord (fire). Therefore those who accept the material nature as the cosmic manifestation's original cause (prakrti, the cause of creation according to Sankhya philosophy) are not correct in their conclusion. The material nature has no separate existence without the Lord. Therefore, setting aside the Supreme Lord as the cause of all causes is the logic of aja-gala-stana-nyaya, or trying to milk the nipples on the neck of a goat. The nipples on the neck of a goat may seem like sources of milk, but to try to get milk from such nipples will be foolish.