Human energy is quite sufficient to provide light for a large city. However, the problem is that this energy is in the form of chaotic motion of electrons in an uncharged conductor.
Electric current is an ordered movement of charged particles. In a conductor where there is no current, the direction vectors of the energies of the charged particles are not unidirectional. This chaotic movement of particles causes the needle of the instrument to not move from the dead point when measuring the current strength. Therefore, by analogy with a conductor, a person also cannot move from the dead point if he does not organize and direct his energies.
A multitude of thoughts arise on the surface of our consciousness every moment. A whole world exists within us, and in this world, a constant play of elements takes place. Pain and joy, victories and defeats, gains and losses are constant companions of a person that shake their entire nature. And so, moving from one extreme to another, the mind makes its owner go round in circles. The Bhagavad Gita says that the mind is both a friend and an enemy of man. For one who has conquered his mind, it is the best friend, and for one who has lost control over it, the mind is the most bitter enemy. The power of the mind is great. And if this power is not controlled, if it is not harmonized and unidirectional, then a person will not only fail to provide light to a large city, but will not light a flashlight of their own nature.
Buddha Shakyamuni asked his disciple, "Tell me, can a man be called a great warrior if he has defeated a thousand opponents in a thousand battles?" "Yes. Such a warrior can be called great," the disciple replied to the teacher. To which the Buddha spoke the following words: "I tell you, he who has conquered himself, subduing his own mind – he is a greater warrior!" Further in the Dhammapada, Shakyamuni Buddha seems to repeat what he said to the disciple: "Noble Sindhi steeds, great elephants, humble mules – good, but better than them is he who has tamed himself. For with these animals one cannot reach that land which he who has tamed himself can reach by practice and dispassion."
Great power is hidden in the control of the mind. "For truly I say to you, if you have faith the size of a mustard seed, you can say to this mountain, 'Move from here to there,' and it will move. Nothing will be impossible for you!" – proclaimed the Great Yogi of Nazareth. Faith is the ability to hold a certain image in your imagination for a long time. It can even be said that faith is a discipline of the mind. Yogis call this willpower and imagination Kriya-Shakti. This power can completely order the particles of our conductor and make us divine.
Kriya-Shakti is developed and strengthened through regular practice. Regularity is of key importance, and yogis pay particular attention to it. Regularity is a necessary condition that brings order to our lives. When the rhythm is established, the energies of life, together with the matter of consciousness, become unidirectional, similar to a conductor through which an electric current flows.
Breathing and mental processes are closely connected to each other. What happens in a person's inner world has its own reflection in the processes of breathing: frequency, depth of breathing, etc. Imagine how a person breathes when they are angry, and how they breathe when they are pleasant and calm. There is also a feedback loop between breathing and the mind. That is, by controlling breathing, one can control the processes in our inner world. The part of yoga that deals with this issue is called pranayama. Pranayama can lead the practitioner to samadhi. This is the highest form of yoga.
Regular practice can completely take control of the mind. Then the mind becomes a tool in our hands. And when this happens, then sankalpa (the power of intention) becomes powerful.