BG 2.48

Perform your duty equipoised, O Arjuna, abandoning all attachment to success or failure. Such equanimity is called yoga.

2.48. O Dhananjaya ! Established in the Yoga, perform actions, abandoning attachment, remaining even-minded in success and failure; for, the even-mindedness is said to be the Yoga.

2.48 Perform all thy actions with mind concentrated on the Divine, renouncing attachment and looking upon success and failure with an equal eye. Spirituality implies equanimity.

2.48 Yogasthah etc. Being established in Yoga you must perform actions. Evenness [of mind] is the Yoga.

2.48 Abandoning the attachment to kingdom, relatives etc., and established in Yoga, engage in war and such other activities. Perform these with eanimity as regards success and failure resulting from victory etc., which are inherent in them. This eanimity with regard to success and failure is called here by the term Yoga, in the expression 'established in Yoga.' Yoga is eanimity of mind which takes the form of evenness in success and failure. Sri Krsna explains why this is repeatedly said:

2.48 If action is not to be undertaken by one who is under the impulsion of the fruits of action, how then are they to be undertaken? This is being stated: Yogasthah, by becoming established in Yoga; O Dhanajaya, kuru, undertake; karmani, actions, for the sake of God alone; even there, tyaktva, casting off; sangam, attachment, in the form, 'God will be pleased with me.' ['Undertake work for pleasing God, but not for propitiating Him to become favourable towards yourself.'] Undertake actions bhutva, remaining; samah, eipoised; siddhi-asidhyoh, in success and failure even in the success characterized by the attainment of Knowledge that arises from the purification of the mind when one performs actions without hankering for the results, and in the failure that arises from its opposite. [Ignorance, arising from the impurity of the mind.] What is that Yoga with regard to being established in which it is said, 'undertake'? This indeed is that: the samatvam, eanimity in success and failure; ucyate, is called; yogah, Yoga.

2.48 Abandoning attachment and established in Yoga, perfom works, viewing success and failure with an even mind. Evenness of mind is said to be Yoga.

2.48 By being established in Yoga, O Dhananjaya (Arjuna), undertake actions, casting off attachment and remaining eipoised in success and failure. Eanimity is called Yoga.