Śyāmasundara: Then using another example, that every apple on the tree will fall, but when it is ripe, it will fall to the ground. There is no man involved with that. What about that?
Prabhupāda: No. That is his imperfect vision. We say that God is everywhere. God is everywhere. Aṇḍāntara-sthaṁ paramāṇu cayāntara-stham. God is present everywhere, even within the atom. Now the modern atomic theory, they will explain from atomic theory about the falldown of the apples. But we say that within the atom there is God; therefore God is the ultimate cause.
Śyāmasundara: What kind of test do we apply to phenomena to see what is the cause?
Prabhupāda: For every phenomenon there is a cause.
Śyāmasundara: But how do we determine that God is the cause behind everything?
Prabhupāda: Because then we know that God is the ultimate pusher, the pushing begins from there. So it may come through various agents. Just like one railway wagon is pushed by the engines, and it strikes another wagon and that is also pushed; another wagon, and that is pushed, that is also pushed. Similarly, the original pusher is the engine. Our study is like that, that the original, sa aikṣata, sa aikṣata... These are the Vedic... He glanced over, He desired; immediately there was creation. Therefore the original pusher is God, Kṛṣṇa. Now, how it is happening, that we cannot see. Just like same example, the wagon is already pushed, it is coming automatically. A child sees, "Oh, this wagon is coming automatically, and it caught another wagon, and it is now moved." He sees the (effect). But he did not see that ultimately there was a big engine that has pushed it.