The Third Morning Walk: April 28, 1973
Recorded on April 28, 1973, In Cheviot Hills Park, Los Angeles
Śrīla Prabhupāda is accompanied by Dr. Singh, Karandhara dāsa adhikārī and other students.
Scientists as thievess
Śrīla Prabhupāda.  [holding a rose in his hand]. Can any scientist create a flower like this in the laboratory?
Dr. Singh , That is not possible..
Śrīla Prabhupāda.  No, it is not. Just see how wonderfully Kṛṣṇa's energy is working! No scientist can create a flower like this in his laboratory. They cannot create even a few grains of sand, yet they claim to possess the most advanced intellects in the universe. This is foolish.
Dr. Singh.  They take matter from Kṛṣṇa, manipulate it, and then claim that  they  have created something wonderful.
Śrīla Prabhupāda.  At least if they would admit that they have taken the matter from Kṛṣṇa, that would be good. We understand that everything comes from Kṛṣṇa.
Dr. Singh.  But they will not admit that they are taking anything from Kṛṣṇa. Instead they say that  they  are the creators.
Śrīla Prabhupāda.  How have they created anything? They take the sand and mix it with some chemicals and make glass. They have not created the sand or the chemicals; they have taken them from the earth. How have they created anything?
Dr. Singh , They say, "We have taken the materials from nature."
Śrīla Prabhupāda.  "From nature" means from a person. They have taken from nature, but they are thieves because everything in nature belongs to Kṛṣṇa.  Īśāvāsyam idaṁ sarvam:  "Everything is God's creation." ( Īśopaniṣad  1) In  Bhagavad-gītā  Kṛṣṇa states that if one does not perform  yajña  [sacrifice], he is a thief.  Yajña  means acknowledging that things have been taken from Kṛṣṇa. We should think, "Kṛṣṇa, You have given us many, many things for our maintenance."  This  much acknowledgement Kṛṣṇa wants; that's all. Otherwise, what can He expect from  you ? What are you in His presence? We should acknowledge Kṛṣṇa's kindness. Therefore, before we eat we offer the food to Kṛṣṇa and say, "Kṛṣṇa, You have given us this nice food, so first You taste it." Then we eat it. Kṛṣṇa is not hungry, yet He can eat the whole world and then again produce it exactly as it was.  Pūrṇasya pūrṇam ādāya pūrṇam evāvaśiṣyate  ( Īśopaniṣad  Invocation). Kṛṣṇa is so perfect that if you take from Kṛṣṇa all of Kṛṣṇa's energy, all the original energy is still with Him.  That  is perfect conservation of energy.
The Origin of Nature
Dr. Singh.  There is a scientific journal called  Nature . It contains articles concerning natural products like plants, flowers and minerals, but it does not mention God.