indriyāṇāṁ hi caratāṁ
yan mano ’nuvidhīyate
tad asya harati prajñāṁ
vāyur nāvam ivāmbhasi
indriyāṇām — of the senses; hi — certainly; caratām — while roaming; yat — with which; manaḥ — the mind; anuvidhīyate — becomes constantly engaged; tat — that; asya — his; harati — takes away; prajñām — intelligence; vāyuḥ — wind; nāvam — a boat; iva — like; ambhasi — on the water.
As a strong wind sweeps away a boat on the water, even one of the roaming senses on which the mind focuses can carry away a man’s intelligence.
. . .
इन्द्रियाणां हि चरतां यन्मनोऽनुविधीयते ।
तदस्य हरति प्रज्ञां वायुर्नावमिवाम्भसि ॥ ६७ ॥