3.11
देवान्भावयतानेन ते देवा भावयन्तु वः | परस्परं भावयन्तः श्रेयः परमवाप्स्यथ ||११||
devān bhāvayatānena te devā bhāvayantu vaḥ parasparaṁ bhāvayantaḥ śhreyaḥ param avāpsyatha
Translation
The demigods, being pleased by sacrifices, will also please you, and thus, by cooperation between men and demigods, prosperity will reign for all.
Interpretation
The principle of reciprocity: humans nourish the divine forces (devas) through their sacrifices and offerings; the divine forces nourish humans in return. This mutual nourishment ('parasparaṁ bhāvayantaḥ') is the foundation of cosmic harmony. When either side breaks the relationship, imbalance results.