Sanskrit word "Yajna" means "Sat Karma - Noble Deeds "   i.e. selfless sacrifice for noble purposes. All activities in the limitless expansion of the universe are said to have generated from a grand eternal Yajna.

The behavior pattern of Nature follows the spirit of Yagya.

The Ocean gives its water to the clouds. Clouds carry and pour then as rain. Rain fed soils and rivers and in turn return to ocean. Each part of body constantly working for the well-being of the whole body.

Wherever we turn our eyes we can see that the cosmos is run on the yajna spirit.