We are not so intelligent to understand that the material nature is working, moving, under the direction of the Supreme Personality. But we can experience it. Just like a machine, computer, a very subtle machine. It is working wonderfully. But there is a person who is pushing the button. Without that the machine is useless. It is lump of matter. Similarly this gigantic universe, cosmic manifestation, nature, is working very wonderfully. The sun is moving, moon is moving and the earth is moving, everything in right direction and minute time, and not a single inch is moving here and there. Everything is going on nicely. How? That is explained in the Bhagavad-gita 9.10. It is under the direction of the Supreme Personality of Godhead.
Lecture on Bhagavad-gita 13.16, Bombay, 10 October, 1973