Atha kena prayukto yam papam carati purusah
anicchann api varsneya balad iva niyojitah
(Text 36, Ch 3, Karma Yoga)
Meaning: Arjuna said: O descendant of Vrsni(divine), by what is one impelled to sinful acts, even unwillingly, as if engaged by force?
*** A living entity, as part and parcel of the Supreme, is originally spiritual, pure, and free from all material contaminations. Therefore, by nature he is not subject to the sins of the material world. But when he is in contact with the material nature, he acts in many sinful ways without hesitation, and sometimes even against his will.
Kama esa kridha esa rajo-guna-samudbhavah
mahasano maha-papma viddhy enam iha vairinam
(Text 37, Ch 3, Karma Yoga)
The Supreme Personality of Godhead said:
It is lust only, Arjuna, which is born of contact with the material mode of passion and later transformed into wrath, and which is the all -devouring sinful enemy of this world.
*** When a living entity comes in contact with the material creation, his eternal love for divine is transformed into lust, in association with the mode of passion. Then again, when lust is unsatisfied, it turns into wrath; wrath is transformed into illusion, and illusion continues the material existence.
The origin of everything is the supreme Brahman. Therefore the origin of lust is also in the Supreme. If therefore, lust is transformed into love for the Supreme, or transformed into divine consciousness-desiring everything for divine-then both lust and wrath can be spiritualized.
Dhumenavriyate vahnir yathadarso malena ca
Yatholbenavrto garbhas tatha tenedam avrtam
(Text 38, Ch 3, Karma Yoga)
Meaning: As fire is covered by smoke, as a mirror is covered by dust, or as the embryo is covered by the womb, the living entity is similarly covered by different degrees of this lust.
***Human form of life is a chance for the living entity to escape the entanglement of material existence. In the human form of life, one can conquer the enemy, lust, by cultivation of divine consciousness.