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The Perfection of Yoga
“No one is anyone’s friend, no one is anyone’s enemy. It is only by behavior that one can understand who is his friend and who is his enemy.” No one is born our enemy, and no one is born our friend. These roles are determined by mutual behavior. As we have dealings with others in ordinary affairs, in the same way the individual has dealings with himself. I may act as my own friend or as an enemy. As a friend, I can understand my position as spirit soul and, seeing that somehow or other I have come into contact with material nature, try to get free from material entanglement by acting in such a way as to disentangle myself. In this case I am my friend. But if even after getting this opportunity I do not take it, then I should be considered my own worst enemy.
bandhur ātmātmanas tasya 
    yenātmaivātmanā jitaḥ 
    anātmanas tu śatrutve 
    vartetātmaiva śatruvat
“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.” (Bg. 6.6) How is it possible for one to become his own friend? This is explained here;  ātmā  means mind, body and soul. When we speak of  ātmā , insofar as we are in the bodily conception, we refer to the body. However, when we transcend the bodily conception and rise to the mental platform,  ātmā  refers to the mind. But actually when we are situated on the truly spiritual platform, then  ātmā  refers to the soul. In actuality we are pure spirit. In this way, according to