Verse 16

किमिदं स्याज्जगत्किं स्याद्देहमित्यनिशं शनैः ।विचारयाध्यात्मदृशा स्वयं वा सज्जनैः सह

In plain words

'What might this world be? What might this body be?' — inquire thus, constantly and gently, with the eye of adhyātma, whether by yourself or together with the good.