Five Elements – In Gita Verse 3.14 All living bodies subsist on food grains, which are produced from rains. Rains are produced by performance of yajña [sacriﬁce], and yajña is born of prescribed duties.
Not by Krishna but our Ayurveda also says that be in gratitude towards all the five elements, space(Ether), earth, water, air and fire. We worship all this five elements for being in our life and taking care of our needs. To nourish our body we need food but grain, food is combination of all the five elements.
Krishna says unless we are in gratitude towards five elements and what they are giving to us we will not be doing our prescribed duties.
Ayurveda evolved in the meditative minds of seers of truth – the rishis. For thousands of years their teachings were transmitted orally from teacher to disciple, and later they were set down in melodious Sanskrit poetry. Though many of these texts have been lost over time, an abundant body of Ayurvedic knowledge survives.
Originating in Cosmic Consciousness, this wisdom was intuitively received in the hearts of the rishis. They perceived that consciousness was energy manifested into the five basic principles or elements.
The rishis perceived that in the beginning the world existed in an unmanifested state of consciousness. From that state of unified consciousness. the subtle vibrations of the cosmic soundless sound aum manifested. From that vibration there first appeared the Ether element. This ethereal element then began to move; its subtle movements created the Air, which is Ether in action. The movement of Ether produced friction, and through that friction heat was generated. Particles of heat-energy combined to form intense light and from this light the Fire element manifested.
Thus, Ether manifested into Air and it was the same Ether that further manifested into Fire. Through the heat of the Fire, certain ethereal elements dissolved and liquified, manifesting the Water element, and then solidified to form the molecules of Earth. In this way. Ether manifested into the four elements of Air, Fire, Water, and Earth.
From Earth, all organic living bodies including those in the vegetable kingdom such as herbs and grains, and those in the animal kingdom. including man, are created. Earth also contains the inorganic substances that comprise the mineral kingdom. Thus, out of the womb of the Five Elements all matter is born.
The five basic elements exist in all matter. Water provides the classic example: the solid state of water, ice, is a manifestation of the Earth principle. Latent heat (Fire) in the ice liquifies it, manifesting the Water principle; and then eventually it turns into steam, expressing the Air principle. The steam disappears into Ether, or space. Thus the five basic elements; Ether, Air, Fire, Water and Earth, are present in one substance. All five originated in the energy issuing from Cosmic Consciousness: all five are present in all matter in the universe. Thus, energy and matter are one.
Man as Microcosm.
Man is a microcosm of nature and so the five basic elements present in all matter also exist within each individual.
Ayurveda regards the human body and its sensory experiences as manifestations of cosmic energy expressed in the five basic elements. The ancient rishis perceived that these elements sprang from pure Cosmic Consciousness. Ayurveda aims to enable each individual to bring his body into a perfect harmonious relationship with that Consciousness.
Krishna by saying that unless you live from your subjectivity you will not realise this five element from which our body is made and having expression of cosmic energy.