Verse 57

अकिंचनात्स्वनिर्णीतौ लम्बमानात्परोक्तिषु ।न मौर्ख्यादधिको लोके कश्चिदस्तीह दुःखदः

In plain words

Nothing gives greater sorrow in this world than folly -- empty of any judgment of its own, and hanging upon the sayings of others.