Gayatri and Yagya constitute the foundation of the Vedic Culture.  While Gayatri imparts wisdom and pure intelligence, Yagya inspires corresponding creativity and actions.  Yagyas played an essential role in the all-round progress, prosperity and happiness in the Vedic age.  This was indeed natural, as the philosophy and science of yagya and the different modes of performing agni-yagya were discovered and developed by the rishis based on their deep understanding and in-depth research of the human psyche, the intricacies of the social fabric and the mysteries of Nature. What we find today in the Indian society is a largely distorted and superficial custom of yagya.  The knowledge of the philosophy and science of yagya is as essential for understanding and experimenting the science of spirituality as the knowledge of elementary physics for the material sciences.