To save the general people from atheism, there is recommendation for worshiping different types of demigods. Generally, they are recommended, five: the sun-god, the Gaṇeśa, the Viṣṇu, Lord Śiva and Durgā, and . . . the sun-god I have already said. Five, pañcopāsanam. Five - the sun-god, the Gaṇeśa, and the Durgā-devī, then Lord Śiva, and then Viṣṇu. This is also gradual evolutionary. People in the most lowest stage of humanity, they are struck with wonder by the power. As soon as there is some electricity, they feel some power. So when there are power worshiper . . . the modern scientists, they are power worshiper. They have gone up to the sun-god. Not god; the sun globe. The power is received from the sunshine. So this is one stage, power. In this way, one after another, when one comes to the supreme powerful, Viṣṇu, because that is the ultimate powerful.
So this is one type of yajña, understanding the supreme power. Just like I was talking a few minutes before, the power. But power is not ultimate. Ultimate is the conductor of power, or the powerful. Just like electricity. Electricity is power, but it is generated from the powerhouse. People generally understand that electricity is coming from the powerhouse. But the powerhouse is maintained by the resident engineer, a person. That is real understanding. Or just like this airplane is flying in the sky. A child may see what a wonderful machine is flying in the sky. He does not know the importance of the pilot. The big, gigantic airship can fly in the sky so long the powerful, or one who knows how to conduct the power, pushing the button. By pushing one button, the plane goes high, and pushing another button, it comes down. It is not automatically. Any machine you take. Nowadays wonderful machine, computer. That is also handled by an expert. Any machine you take, without an expert technologist, it cannot work.