When one pours water on the root of a tree, the branches, trunk, twigs, flowers and leaves are all satisfied. Similarly, when one gives food to the stomach, all parts of the body are rejuvenated. In the same way, if one simply satisfies Lord Viṣṇu by the performance of yajña, one satisfies all the demigods automatically. In turn, the demigods offer their benedictions to such a devotee.