Verse 31

यथा रजोभिर्गगनं यथा कमलमम्बुभिः ।न लिप्यते हि संश्लिष्टैर्देहैरात्मा तथैव च

In plain words

As the sky is not stained by dust-motes, as the lotus is not stained by water, so too the Self is not tainted, even by bodies with which it is closely joined.