Mahabharata Bhishma Parva Chapter 42:2

Mahabharata Bhishma Parva (Bhagavat-Gita Parva) Chapter 42:2 Bhagavad Gita Chapter XVIII That knowledge which discerneth all things as diverse essences of different kinds in consequence of their separateness, know that that knowledge hath the quality of passion. But that which is attached to (each) single object as if it were the whole, which is without reason, without truth, and mean, that knowledge hath been said to be of the quality of darkness. The action which is prescribed (by the scriptures), (done) without attachment, performed without desires and aversion, by one who longeth not for (its) fruit, is said to be of the quality of goodness. But that action which is done by one seeking objects of desire, or by one filled with egoism, and which is attended with great trouble, is said to be of the quality of passion. That action which is undertaken from delusion, without regard to consequences, loss, injury (to others), and (one's own) power also, is said to be of the quality of passion. The agent who is free from attachment, who never speaketh of himself, who is endued with constancy and energy, and is unmoved by success and defeat, is said to be of the quality of goodness. The agent who is full of affections, who wisheth for the fruit of actions, who is covetous, endued with cruelty, and impure, and who feeleth joy and sorrow, is declared to be of the quality of passion. The agent who is void of application, without discernment, obstinate, deceitful, malicious, slothful, desponding, and procrastinating, is said to be of the quality of darkness. Hear now, O Dhananjaya, the three-fold division of intellect and constancy, according to their qualities, which I am about to declare exhaustively and distinctly. The intellect which knoweth action and inaction, what ought to be done and what ought not to be done, fear and fearlessness, bondage and deliverance, is, O son of Pritha, of the quality of goodness. The intellect by which one imperfectly discerneth right and wrong, that which ought to be done and that which ought not to be done, is, O son of Pritha, of the quality of passion. That intellect which, shrouded by darkness, regardeth wrong to be right, and all things as reversed, is, O son of Pritha, of the quality of darkness. That unswerving constancy by which one controls the functions of the mind, the life-breaths, and the senses, through devotion, that constancy, is, O son of Pritha, of the quality of goodness. But that constancy, O Arjuna, by which one holds to religion, desire, and profit, through attachment, desiring fruit, that constancy, O son of Pritha, is of the quality of passion. That through which an undiscerning person abandons not sleep, fear, sorrow, despondency, and folly, that constancy is deemed to be of the quality of darkness. Hear now from me, O bull of Bharata's race, of the three kinds of happiness. That in which one findeth pleasure from repetition (of enjoyment), which bringeth an end to pain, which is like poison first but resembleth nectar in the end, that happiness born of the serenity produced by a knowledge of self, is said to be of the quality of goodness.