Just like the motorcar is going, gacchati. But the motorcar is not moving without any driver. There is a machine, very first class machine, Rolls-Royce car, Cadillac car, good machine, but the machine is useless unless there is a driver. The aeroplane is moving, but without the pilot it cannot move. Therefore material elements, however, I mean to say, wonderful it may be, it has no value without the spirit soul. That is the explanation here. Apareyam.
Kṛṣṇa has explained the material elements: bhūmir āpo 'nalo vāyuḥ khaṁ mano buddhir eva ca (BG 7.4). But these material elements cannot work independently. It must be added with the superior energy, or the living energy, jīva-bhūtāṁ mahā-bāho yayedaṁ dhāryate jagat. This Bombay city is important because there are so many living entities. Otherwise, where there are no living entities . . . even in Bombay, there are some open land. What is the value? There is no value. Therefore the conclusion should be that material elements may be wonderful, but it has no value without the touch of living entities. Modern scientists, they cannot understand that there is living, spiritual energy behind this material energy, therefore it is moving. They are . . . just like a child cannot understand that the motorcar or the aeroplane is moving because there is driver and the pilot. Foolish children may think, "Oh, how the motorcar is going on?" The motorcar is not going on independently. That the child does not know. Therefore, those who have no information of the spiritual energy behind the material energy, they are children, foolish children. Mūḍha. They have been described as mūḍha.