"Verily when a man gives all thoughts, does not get attached to sense-objects and actions, then alone he is said to have attained to Yoga" (4-VI)
He who has attained to Yoga is 'Yogarudha'. He is no longer attached to the sense-objects like sound, form, touch etc. He does not have any duties, obligatory or otherwise to perform. As he does not have any purpose to achieve by performing actions, he ceases to pursue them. Having given all desires of the world, he does not have any thoughts or ego-instigated plans (samkalpa) of any sort. As such, his mind is always peaceful and calm. This is the characteristic if the man who has scaled the peak of Yoga (Yogarudha).
A man should uplift himself by his own Self; he should hot cause his Self to sink low. For, he alone is the friend of himself; he alone is the enemy of himself". (5-VI)
A man has to elevate his Self, sunk in the sensual world, by means of the self. It means, he has to struggle hard and put conscious efforts to pull his lower Self upwards and make it scale the peak of Yoga. No friend from outside can be of any help to him in this regard. Therefore the Lord says that he alone is the friend of himself and he alone is the enemy of himself.
When the ego is guided by discriminative wisdom it chooses to lead a life of self-restraint and self-control. And then, by spiritual disciplines like prayers and meditation it rises to the level of the Higher Self (Ego) acts as its own friend and benefactor. But if the Ego-Self refuses to be guided by reason and discrimination, it will certainly entangle itself in the meshes of the sensual world of lust and wealth. As a result it will be caught up in the Karmic reactions of miseries, pain and sufferings. Here the Ego-Self acts like an external enemy causing its own downfall and degradation.
No one should cause his Self to sink low, that is, in the dark ocean of sensual world, which is full of sufferings, pain and births and deaths. One should always try to raise one's soul from this mundane world to the highest state of perfection.
"His Self (mind) is the friend whose Self (mind) is conquered by the Self; but to him who has not subdued the Self (mind), his own Self acts as the enemy". (6-VI)
Self is the friend of that Self which has been brought under subjugation. The subdued Self is the complex of body, mind and the senses, in which mind is the chief component. But he whose Self (the body, mind and the senses equipment) is unconquered, his Self acts as his own enemy like and external foe.
When the body, mind and the senses are subjugated one can find high ideals rising within him spontaneously. Then the things that belong to the sense-world will touch him no more. He gradually evolves into godhead. Thus the man who is given to self-control and self-culture brings about his own elevation. And he who is a slave of his desires and acting as he likes causes his own downfall.
"The self-controlled and serene man's Supreme Self is steadfast in cold and heat, pleasure and pain as also in honour and dishonour". (7-VI)
The man who has not secured full control over his body, mind and the sense-organs cannot be serene and at peace with himself. But he who is established in self-control has absolute peace. In that state of peacefulness his self becomes the Supreme Self. That means, the same individual Self which was full of imperfections will reach perfection and will be united with the Supreme Self. Thus the Supreme Spirit will begin to manifest in the individual Self. The man who has become one with the Supreme Self will be the same in state like heat and cold, pleasure and pain and honour and disgrace.