You might think that divine sparks are meted out by simple protocol: The lowlier the creation, the lowlier the divine spark it holds.

Just the opposite: Only the highest sparks could descend to the lowest places and retain their power to sustain a being.

Those are the sparks remaining to be rescued today.

Likkutei Torah, Tzav 13b and Re’eh 19c. Maamar Beshaah She’alah 5729:6.