Bhagavad Gita -Srila Prabhupada 172

Shrimad Bhagavad Gita As It Is -Shri Shrimad A.C Bhaktivedanta Swami Prabhupada

Karma-yoga Chapter 3: Verse-42 If the mind is engaged in the transcendental service of the Lord, there is no chance of its being engaged in the lower propensities. In the Katha Upanisad the soul has been described as mahän, the great. Therefore the soul is above all—namely, the sense objects, the senses, the mind and the intelligence. Therefore, directly understanding the constitutional position of the soul is the solution of the whole problem. With intelligence one has to seek out the constitutional position of the soul and then engage the mind always in krsna consciousness. That solves the whole problem. A neophyte spiritualist is generally advised to keep aloof from the objects of the senses. But aside from that, one has to strengthen the mind by use of intelligence. If by intelligence one engages one’s mind in krsna consciousness, by complete surrender unto the Supreme Personality of Godhead, then, automatically, the mind becomes stronger, and even though the senses are very strong, like serpents, they will be no more effective than serpents with broken fangs. But even though the soul is the master of intelligence and mind, and the senses also, still, unless it is strengthened by association with krsna in krsna consciousness, there is every chance of falling down due to the agitated mind.