Bhagavad Gita · Sankhya YogaChapter 2, Shloka 67 (2.67)

The boat and the wind. Shankaracharya: just as on water the wind takes the boat of jigamiṣatām — those wanting to go somewhere — and mārgād uddhṛtya unmārge — lifts it off the right course onto a wrong one, so the mind following the senses, ātma-viṣayāṃ prajñāṃ hṛtvā — snatching away the wisdom turned towards the self — makes it viṣaya-viṣayā — turned towards sense objects.

Ramanuja — a "contrary" wind. Ramanujacharya: yathā ambhasi nīyamānāṃ nāvaṃ pratikūlo vāyuḥ prasahya harati — just as a contrary wind forcibly carries off a boat being steered across the water. The mind makes wisdom viṣaya-pravaṇa — inclined towards sense objects.

Even one sense is enough — Madhusudana. Madhusudana Saraswati reads the "yat" of the shloka this way: among the senses wandering among objects, yad ekam apīndriyam — if the mind follows even one sense, tad indriyam ekam api manasānusṛtam … prajñāṃ harati — even that one sense, followed by the mind, carries away wisdom. Just as a single strong gust turns a boat.