Verse 18

आत्मा चित्ततया देहभूतान्याश्लेषयन्स्थितः ।तृणान्यावृत्तवृत्तान्तकलनोत्सिक्तमब्धिवत्

In plain words

The self stands as citta, binding together the elements of the body -- like the ocean, swollen with the play of its rolling currents, binding together blades of grass.