Wisdom from the Bhagavad Gita 12

33. Even a wise man acts in accordance with his own nature: beings follow nature. What can restraint do?

34. Attachment and aversion of the senses for their respective objects are natural. Let none come under their sway: they are his foes.

35. Better is one's own Dharma, though imperfect, than the Dharma of another well-performed. Better is death in one's own Dharma: the Dharma of another is fraught with fear. 

Arjuna said: 

36. But by what impelled does man commit sin, though against his wishes, O Vârshneya, constrained as it were, by force?

The Blessed Lord said:
  
37. It is desire—it is anger, born of the Rajo-Guna (Passion): of great craving, and of great sin; know this as the foe here in this world.

38. As fire is enveloped by smoke, as a mirror by dust, as an embryo by the secundine, so is it covered by that.

39. Knowledge is covered by this, the constant foe of the wise, O son of Kunti, the unappeasable fire of desire.

40. The senses, the mind and the intellect are said to be its abode: through these, it deludes the embodied by veiling his wisdom.

41. Therefore, O Bull of the Bharata race, controlling the senses at the outset, kill it—the sinful, the destroyer of knowledge and realization.

42. The senses are said to be superior to the body; the mind is superior to the senses; the intellect is superior to the mind; and that which is superior to the intellect is He, the Atman. 

43. Thus, knowing Him who is superior to the intellect, and restraining the self by the Self, destroy, O mighty-armed, that enemy, the unseizable foe, desire.

—Bhagavad Gita, 3:33-43