Moshe took the blood of the sacrifices and divided it, sprinkling half on the altar, and the other half towards the people. This expresses the idea that every drop of blood, that we use in carrying out Hashem’s will in this world, is returned to us in the full measure and precise manner that we give it to Hashem. This is Hashem’s response to the Naase Vnishma of the Bnei Yisroel. The blood symbolizes the mutuality of the covenant. We receive our lifeblood from Hashem, and we only have true possession of ourselves, if we dedicate ourselves to Him.
