from blood. A man has mystic power in his body so that because he is sexually inclined, blood is transformed into semen. How is this done unless there is some mystic power involved? There are many mystic powers in the living entities. The cow eats grass and produces milk. Everyone knows this, but can you take some grass and produce milk? Can you? Therefore there is mystic power within the cow. As soon as the cow eats grass, she can transform it into milk. Men and women are basically the same, but as a man you cannot eat food and produce milk, although a woman can. These are mystic powers.
Dr. Singh.  Scientists would say that there are different enzymes or chemicals inside different types of bodies and that these account for the cow's producing milk.
Śrīla Prabhupāda.  Yes, but who produced those enzymes and that arrangement? That was done by mystic power. You cannot make these enzymes or that arrangement. You cannot produce milk from dry grass in your laboratory. Within your body, by mystic power, you can transform food into blood and tissue, but in your laboratory, without mystic power, you cannot even transform grass into milk. Therefore you must accept the existence of mystic power.
The Origin of Mystic Powerr
Śrīla Prabhupāda.   Yogīs  are mainly concerned with developing different mystic powers. A  yogī  can walk on the water without drowning. The law of gravity does not operate on him. That is a mystic power called  laghimā .  Laghimā  means that a person can become lighter than cotton and counteract the law of gravity. The  yoga  system simply develops the inconceivable potency already present in the practitioner. These boys are swimming [gesturing to surf bathers], but I cannot swim. Yet that swimming power is potential within me; I simply have to practice it. So, if yogic power is so potent in the human being, think how much more yogic power God has. Therefore, in the  Vedas  He is called Yogeśvara, which means "master of all mystic power." In the  Bhagavad-gītā  (10.8) Kṛṣṇa says,  ahaṁ sarvasya prabhavo mattaḥ sarvaṁ pravartate : "I am the source of all spiritual and material worlds. Everything emanates from Me." Unless we accept this statement from God, there is no conclusive explanation to the origin of material nature. God cannot be understood without accepting the existence of mystic power, but if you understand God scientifically, then you will understand everything.
Dr. Singh.  So do you mean to say that science has started from an intermediate point-not from the original point?
Śrīla Prabhupāda.  Yes, that is it exactly. They are ignorant of the origin. The scientists start from one point-but where does that point come from? That they do not know, in spite of vast research. One has to accept that the original source is God, who is full of all mystic powers and from whom everything emanates. He Himself says in the  Bhagavad-gītā ,  aham sarvasya prabhavo mattaḥ sarvam pravartate : "I am the source of all spiritual and material worlds. Everything emanates from Me." [Bg. 10.8] Our conclusions are not based on blind faith; they are most scientific. Matter comes from life. In life-in the origin-there are unlimited material resources; that is the great mystery of creation. If you drop a needle, it will fall immediately, but a bird weighing several pounds can float in the air. We must establish the  origin  of this floating. If we study nature, we find that every living entity has some mystic power. A man cannot live within the water for more than a few hours, yet a fish lives there continuously. is that not mystic power?
Dr. Singh , It is mystic power for me, but not for the fish...