Yagnavalkya said in the Brihadaranyaka Upanishad said this no dual statement:
“That which breathes in is thy Self, which is within all. That which breathes down is thy Self, which is within all. That which diffuses breath is thy Self, which is within all. That which breathes out is thy Self, which is within all. Again I reply:
This, thy Self, which is within all.”
