Srimad-Bhagavad-Gita
TENTH CHAPTER — The Blessed Lord said:

10. The relinquisher endued with Sattva and a steady understanding and with his doubts dispelled, hates not a disagreeable work nor is attached to an agreeable one.

11. Actions cannot be entirely relinquished by an embodied being, but he who relinquishes the fruits of action is called a relinquisher.

12. The threefold fruit of action--disagreeable, agreeable and mixed,--accrues to non-relinquishers after death, but never to relinquishers.

13. Learn from Me, O mighty-armed, these five causes for the accomplishment of all works as declared in the wisdom which is the end of all action:

14. The body, the agent, the various senses, the different functions of a manifold kind, and the presiding divinity, the fifth of these;

15. Whatever action a man performs by his body, speech and mind--whether right or the reverse--these five are its causes.

16. Such being the case, he who through a non-purified understanding looks upon his Self, the Absolute, as the agent, he of perverted mind sees not.

17. He who is free from the notion of egoism, whose intelligence is not affected (by good or evil), though he kills these people, he kills not, nor is bound (by the action);

18. Knowledge, the known and the knower form the threefold cause of action. The instrument, the object and the agent are the threefold basis of action.

19. Knowledge, action and agent are declared in the Sankhya philosophy to be

of three kinds only, from the distinction of Gunas: hear them also duly.

20. That by which the one indestructible Substance is seen in all beings, inseparate in the separated, know that knowledge to be Sattvika.

21. But that knowledge which sees in all beings various entities of distinct kinds as different from one another, know thou that knowledge as Rajasika.

22. Whilst that which is confined to one single effect as if it were the whole, without reason, without foundation in truth, and trivial,--that is declared to be Tamasika.

23. An ordained action done without love or hatred by one not desirous of the fruit and free from attachment, is declared to be Sattvika.

24. But the action which is performed desiring desires, or with self-conceit and with much effort, is declared to be Rajasika.

25. That action is declared to be Tamasika which is undertaken through delusion, without heed to the consequence, loss (of power and wealth), injury (to others) and (one's own) ability.

26. An agent who is free from attachment, non-egotistic, endued with fortitude and enthusiasm and unaffected in success or failure, is called Sattvika.

27. He who is passionate, desirous of the fruits of action, greedy, malignant, impure, easily elated or dejected, such an agent is called Rajasika.

28. Unsteady, vulgar, arrogant, dishonest, malicious, indolent, desponding and procrastinating, such an agent is called Tamasika.