SB 5.6.2 — Śrīla Śukadeva Gosvāmī replied: My dear King, you have spoken correctly. However, after capturing animals, a cunning hunter does not put faith in them, for they might run away. Similarly, those who are advanced in spiritual life do not put faith in the mind. Indeed, they always remain vigilant and watch the mind’s action
SB 5.6.3 — All the learned scholars have given their opinion. The mind is by nature very restless, and one should not make friends with it. If we place full confidence in the mind, it may cheat us at any moment. Even Lord Śiva became agitated upon seeing the Mohinī form of Lord Kṛṣṇa, and Saubhari Muni also fell down from the mature stage of yogic perfection.
SB 5.6.4 — An unchaste woman is very easily carried away by paramours, and it sometimes happens that her husband is violently killed by her paramours. If the yogī gives his mind a chance and does not restrain it, his mind will give facility to enemies like lust, anger and greed, and they will doubtlessly kill the yogī.
SB 5.6.5 — The mind is the root cause of lust, anger, pride, greed, lamentation, illusion and fear. Combined, these constitute bondage to fruitive activity. What learned man would put faith in the mind?