A man must elevate himself by his own mind, not degrade himself. The mind is the friend of the conditioned soul, and his enemy as well. 6.5
For him who has conquered the mind, the mind is the best of friends; but for one who has failed to do so, his very mind will be the greatest enemy. 6.6
For one who has conquered the mind, the Supersoul is already reached, for he has attained tranquility. To such a man happiness and distress, heat and cold, honor and dishonor are all the same. 6.7
A person is said to be established in self-realization and is called a yogi when he is fully satisfied by virtue of acquired knowledge and realization. Such a person is situated in transcendence and is self-controlled. He sees everything--whether it be pebbles, stones or gold--as the same. 6.8
There is no possibility of one's becoming a yogī, O Arjuna, if one eats too much, or eats too little, sleeps too much or does not sleep enough. 6.16
He who is temperate in his habits of eating, sleeping, working and recreation can mitigate all material pains by practicing the yoga system. 6.17
As a lamp in a windless place does not waver, so the transcendentalist, whose mind is controlled, remains always steady in his meditation on the transcendent Self. 6.19
One should engage oneself in the practice of yoga with undeviating determination and faith. One should abandon, without exception, all material desires born of false ego and thus control all the senses on all sides by the mind. 6.24
From whatever and wherever the mind wanders due to its flickering and unsteady nature, one must certainly withdraw it and bring it back under the control of the Self. 6.26
O mighty-armed son of Kuntī, it is undoubtedly very difficult to curb the restless mind, but it is possible by constant practice and by detachment. 6.35