In Bhagavad-gita (17.6), the Supreme Personality of Godhead also declares:
"Those who undergo severe austerities and penance not recommended in the scriptures, performing them out of pride, egotism, lust and attachment, who are impelled by passion and who torture their bodily organs as well as the Supersoul dwelling within are to be known as demons."
In Bhagavad-gita (3.5-9) the Supreme Personality of Godhead explains:
"All men are forced to act helplessly according to the impulses born of the modes of material nature. Therefore no one can refrain from doing something, not even for a moment.
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LIVING ENERGY
We may think we are attracted to the beautiful body of a woman, but actually it is the spark of life which attracts us. When Marilyn Monroe “died”, when the life force left the material body, the body was no longer attractive. All that was left was a lump of unattractive matter that was thrown in the dirt. So is it logical to think that material energy is all-attractive? No. Life force or spirit is the attractive element.
Science of Identity Foundation - Siddhaswarupananda
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"One who restrains the senses and organs of action, but whose mind dwells on sense-objects, certainly deludes himself and is called a pretender.
"On the other hand, he who controls the senses by the mind and engages his active organs in works of devotion, without attachment, is by far superior.
"Perform your prescribed duty, for action is better than inaction. A man cannot even maintain his physical body without work.
"Therefore, O son of Kunti, perform your prescribed duties for His satisfaction, and in that way you will always remain unattached and free from bondage."
In Bhagavad-gita (3.20-21 and 3.29) the Supreme Personality of Godhead again explains:
"Even kings like Janaka and others attained the perfectional stage by performance of prescribed duties. Therefore, just for the sake of educating the people in general, you should perform your work.
"Whatever action is performed by a great man, common men follow in his footsteps. And whatever standards he sets by exemplary acts, all the world pursues."