Verse 21

अविनाभाविनोर्यस्तु संबन्धः कथमेतयोः ।जडचेतनयोर्देहदेहिनोरनुभूयते

In plain words

But this connection, as of two things that cannot exist apart, between these two -- the insentient and the sentient, the body and the embodied -- how is it that it comes to be felt at all?