Mantra 5

यस्त्वविज्ञानवान्भवत्ययुक्तेन मनसा सदा ।तस्येन्द्रियाण्यवश्यानि दुष्टाश्वा इव सारथेः ॥ ५ ॥

In plain words

But he who lacks understanding, whose mind is never held in check, his senses are unmanageable, like a charioteer's vicious horses.