Those who are ignorant of the supreme purpose of life will never be able to attain nirvana (liberation) in spite of their observance of the vratas (vows) and niyamas (rules) of religious conduct and practice of shila (celibacy) and tapas (penance).
You may control a mad elephant; You may shut the mouth of the bear and the tiger; Ride the lion and play with the cobra; By alchemy you may earn your livelihood; You may wander through the universe incognito; Make vassals of the gods; be ever youthful; You may walk on water and live in fire; But control of the mind is better and more difficult.
As long as you have attachment to the body and attachment to objects, fear and suffering will be with you. Therefore Krishna told Arjuna to develop his discrimination and rid himself of body consciousness. Only then he would be able to develop integral vision.
