Wisdom from the Bhagavad Gita 6

39. The wisdom of Self-realization has been declared unto you. Hearken you now to the wisdom of Yoga (Discipline), endued with which, O son of Prithâ, you shall break through the bonds of Karma (Action).
 
40. In this, there is no waste of the unfinished attempt, nor is there production of contrary results. Even very little of this Dharma (Duty) protects from the great terror.

41. In this, O scion of Kuru, there is but a single one-pointed determination. The purposes of the undecided are innumerable and many-branching.

42-44. O Pârtha, no set determination is formed in the minds of those that are deeply attached to pleasure and power, and whose discrimination is stolen away by the flowery words of the unwise, who are full of desires and look upon heaven as their highest goal, and who, taking pleasure in the panegyric words of the Vedas (Scriptures), declare that there is nothing else. Their flowery words are exuberant with various specific rites as the means to pleasure and power, and are the causes of new births, as the result of their works performed with desire.

45. The Vedas deal with the three Gunas (Sattva/Goodness, Rajas/Passion, and Tamas/Darkness). Be you free, O Arjuna, from the triad of the Gunas, free from the pairs of opposites, ever-balanced, free from the thought of getting and keeping, and established in the Self.

46. To the Brâhmana (Seeker of Knowledge) who has known the Self, all the Vedas are of so much use as a reservoir is when there is a flood everywhere.

47. Your right is to work only, but never to the fruits thereof. Be you not the producer of the fruits of your actions; neither let your attachment be towards inaction. 

48. Being steadfast in Yoga, Dhananjaya, perform actions, abandoning attachment, remaining unconcerned as regards success and failure. This evenness. of mind in regard to success and failure is known as Yoga.

—Bhagavad Gita, 2:39-48