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THE SCIENCE OF SELF-REALIZATION
sarva-kāraṇa-kāraṇam , the cause of all causes. If you understand the cause of all causes, then you understand everything.  Yasmin vijñāte sarvam evaṁ vijñātaṁ bhavati:  “If you know the original cause, the later, subordinate causes are automatically known.” Although the scientists are searching after the original cause, when the  Vedas , which contain perfect knowledge, give the original cause, they won't accept. They keep to their partial, imperfect knowledge.
Dr. Singh:  Scientists are worried about energy sources, and now they are working to utilize solar energy for cooking, lighting, and various other purposes. They are hoping that when they exhaust all other energy sources, they will be able to use solar energy.
Śrīla Prabhupāda:  This is not a very new theory. Everyone knows that because the roots of trees store the sun's energy, it is possible to get fire from a tree. These scientists are tiny creatures, but they are very proud. We don't give them credit, because they are simply stating what everyone knows. As soon as you cut a tree, you cannot get fire from it. It has to be dried in the sun. When the energy is gathered from the sun, the tree can be utilized for fire. Actually everything is being maintained by the sun's energy, but the scientists don't know where the sun's energy comes from. In the  Bhagavad-gītā  [15.12] Kṛṣṇa says:
yad āditya-gataṁ tejo jagad bhāsayate 'khilam yac candramasi yac cāgnau tat tejo viddhi māmakam
“The splendor of the sun, which dissipates the darkness of this whole world, comes from Me. And the splendor of the moon and the splendor of fire are also from Me.”
Again, Kṛṣṇa says,  jyotiṣāṁ ravir aṁśumān:  “Of lights I am the radiant sun.” [Bg. 10.21] Also, in the Eleventh Chapter of the  Bhagavad-gītā  Arjuna tells Kṛṣṇa,  śaśi-sūrya-netram:  “The sun and moon are among Your great, unlimited eyes.” This knowledge is contained in the  Bhagavad-gītā , but scientists cannot attain this knowledge by their speculation. Can they?
Dr. Singh:  It is not possible.
Śrīla Prabhupāda:  And what is their knowledge? The scriptures say that even if you counted all the grains of sand on earth, you still would not be able to understand God. All this material counting does not mean that you have the capacity to understand the unlimited. But it is even beyond