We Hindus don't just consider it as breathing, our world view is different. Breathing techniques in India are called Pranayama which means controlling prana.
This is an excerpt from chapter-3 of Raja yoga by Swami Vivekananda.
Pranayama is not as may think, something about breath. Breath indeed has very little to do with it if anything. Breathing is only one of the many exercises through which we get to the real Pranayama. Pranayama means the control of Prana. According to the philosophers of India the whole universe is composed of two materials, one of which they call Akasha, It is the omnipresent, all-penetrating existence. Everything that has form, everything that is the result of combination, is evolved out of this Akasha. It is the Akasha that becomes the air, that becomes the liquids, that becomes the solids; it is the Akasha that becomes the sun, the earth, the moon, the stars, the comets; it is the Akasha that becomes the human body, the animal body, the plants every form that we see, everything that can be sensed, everything that exists. It cannot be perceived; it is so subtle that it is beyond all ordinary perception; it can only be seen when it has become gross, has taken form. At the beginning of creation there is only this Ākāsha. At the end of the cycle the solids, the liquids, and the gases all melt into the Akasha again, and the next creation similarly proceeds out of this Akāsha.
By what power is this Akasha manufactured into this universe? By the power of Prāna. Just as Akasha is the infinite, omnipresent material of this universe, so is this Prāna the infinite, omnipresent manifesting power of this universe. At the beginning and at the end of a cycle everything becomes Akāsha, and all the forces that are in the universe resolve back into the Prāna; in the next cycle, out of this Prāna is evolved everything that we call energy, everything that we call force. It is the Prāna that is manifesting as motion; it is the Prāna that is manifesting as gravitation, as magnetism. It is the Prāna that is manifesting as the actions of the body, as the nerve currents, as thought force. From thought down to the lowest force, everything is but the manifestation of Prāna. The sum total of all forces in the universe, mental or physical, when resolved back to their original state, is called Prana.
"When there was neither aught nor naught when darkness was covering darkness, what existed then? That Akäsha existed without motion." The physical motion of the Präna was stopped, but it existed all the same.
At the end of a cycle the energies now displayed in the universe quiet down and become potential. At the beginning of the next to cycle they start up, strike upon the Akäsha, and out of the Akāsha evolve these various forms, and as the Ākāsha changes, this Prana changes also into all these manifestations of energy. The knowledge and control of this Prāna is really what is meant by Pranayama.
FWIW Buddhism is different from the "People of the Book" (Jews, Christians, Muslims all worship literally the same God.) Buddhism is not monotheistic.
(The resolution between these forms was given in South Park of all places: God appears on Earth and mentions in passing that He is Buddhist.)
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Uh, heh, Hinduism is also different from the "People of the Book", and from Buddhism. The Gita is, of course, Hindu, not Buddhist. (I'm not sure how I got confused in the previous portion of this comment, sorry. No offense intended!)
If one is reading Holy Bible or Koran, one needs to adhere that they are the only god.
But in nowhere in Hinduism, Buddhism, Jainism, Sikhism, ...
Or any other religions from Indian origin claim their's is the only truth.
All of them are completely fine with different view points.
For example Hinduism is too broad, it literally accepts everything.
For Ex:
There is only one God, there are many gods, there is no God.
One can be an atheist and be a good Hindu.
You need to pray to god, you shouldn't pray to god.
But there is an unification among all Indian religions. For ex: All religions go in search of God/Truth.
Any how, Bhagavadgita, should rather be looked up-on like a more of philosophical text rather than religious book.
It is the essence of MahaBharata, yet another religious text book.
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