Prabhupāda: This is material energy. Bhūmir āpo 'nalaḥ, explain that.
Puṣṭa-kṛṣṇa: That the material energies—earth, water, fire, air, ether, mind, intelligence and false ego—these energies, they come from Kṛṣṇa. In other words, we are speaking of energy. There is an origin to the energy. We always have an experience. Just like there is sunshine here, but the sun, origin, is millions of miles away. So in the same way these energies also have origin. It's not that they are just existing without some source. And Kṛṣṇa is describing here in the Seventh Chapter—this is called Knowledge of the Absolute—how these energies are related to Him. Now, in the material world it's described that there are two energies. This is called bhinnā prakṛtir aṣṭadhā, inferior energy. This will be described in the next verse. Apareyam itas tv anyāṁ prakṛtiṁ viddhi me parām (BG 7.5). Now, this is describing the superior energy or the parām, the parāṁ prakṛti. And this is described, "Besides this inferior nature," which is this earth, air, water, fire, ether, "O Mighty-armed Arjuna, there is a superior energy of Mine which are all the living entities who are struggling with material nature and are sustaining the universe." So this earth, air, water, fire and ether... Just like your body, it is being sustained by the soul. And as soon as the soul leaves the body, then, of course, the earth, air, water, fire and ether, it is no longer sustained in this fashion. It merges into the various elements or energies. And in this way, we can understand that the material world is made up of two energies, as my spiritual master said: the inferior energy, or this aparā-prakṛti, earth, air, water, fire, ether, etc., and the superior energy, or the living force. So the point is that the life force does not come from a combination of earth, air, water, fire, ether. It is separate. That is a superior energy. And on this point we agree. Now, we have to find out what is the source of both the superior and inferior material energies, or what is God.
Prabhupāda: And that is spiritual energy. That is spiritual energy. When we find out the source of these two energies, that the beginning of spiritual life, or spiritual understanding.