Ancient seers
This eternal wisdom of vedas was revealed to the Ancient Rishis or the sages at the dawn of the mankind on the earth. The Rishis or sages of yore have made experiments and researches in meditation and given to the world their spiritual experiences.
Spiritual experiences
The ancient rishis or the sages experienced the reality of life in the deep state of meditation
The reality
The ultimate reality is neither the world of matter nor the physical body, but the supreme soul or the spirit supreme in the cosmos and the individual soul in the body with its senses.