Verse 10

संघट्टात्काष्ठपयसोर्यथोत्तुङ्गाः कणादयः ।देहात्मनोः समायोगात्तथैताश्चित्तवृत्तयः

In plain words

As, from the clash of wood and water, there arise leaping drops and the like, so from the union of body and self arise these vṛttis of citta.