इन्द्रियाणां हि चरतां यन्मनोऽनुविधीयते। तदस्य हरति प्रज्ञां वायुर्नावमिवाम्भसि ॥

indriyāṇāṁ hi charatāṁ yan mano ’nuvidhīyate tadasya harati prajñāṁ vāyur nāvam ivāmbhasi

Such of the roving senses as the mind yieldeth to, that hurries away the understanding, just as the gale hurries away a ship upon the waters.

In plain words: If the mind follows the wandering senses, it drags away a person's good sense. It is like strong wind pushing a ship off course on the sea.