Gita Chapter 5.05 to 5.10

Sannyaasastu mahaabaaho duhkham aaptuma yogatah;
Yogayukto munir brahma na chirenaadhigacchati.
6. But renunciation, O mighty-armed Arjuna, is hard to attain without Yoga; theYoga-harmonised sage proceeds quickly to Brahman!

Yogayukto vishuddhaatmaa vijitaatmaa jitendriyah;
Sarvabhootaatmabhootaatmaa kurvannapi na lipyate.
7. He who is devoted to the path of action, whose mind is quite pure, who has conquered the self, who has subdued his senses and who has realised his Self as the Self in all beings, though acting, he is not tainted.

Naiva kinchit karomeeti yukto manyeta tattwavit;
Pashyan shrunvan sprishan jighran nashnan gacchan swapan shwasan.
8. “I do nothing at all”—thus will the harmonised knower of Truth think—seeing, hearing, touching, smelling, eating, going, sleeping, breathing,

Pralapan visrijan grihnan nunmishan nimishannapi;
Indriyaaneendriyaartheshu vartanta iti dhaarayan.
 9. Speaking, letting go, seizing, opening and closing the eyes—convinced that the senses move among the sense-objects.
COMMENTARY: The liberated sage always remains as a witness of the activities of the senses as he identifies himself with the Self.

Brahmanyaadhaaya karmaani sangam tyaktwaa karoti yah;
Lipyate na sa paapena padmapatram ivaambhasaa.
10. He who performs actions, offering them to Brahman and abandoning attachment, is not tainted by sin as a lotus leaf by water.

Gita Chapter 4.21to 4.25

Niraasheer yatachittaatmaa tyaktasarvaparigrahah;
Shaareeram kevalam karma kurvannaapnoti kilbisham.
21. Without hope and with the mind and the self controlled, having abandoned all greed, doing mere bodily action, he incurs no sin.

Yadricchaalaabhasantushto dwandwaateeto vimatsarah;
Samah siddhaavasiddhau cha kritwaapi na nibadhyate.
22. Content with what comes to him without effort, free from the pairs of opposites and envy, even-minded in success and failure, though acting, he is not bound.

Gatasangasya muktasya jnaanaavasthitachetasah;
Yajnaayaacharatah karma samagram pravileeyate.
23. To one who is devoid of attachment, who is liberated, whose mind is established in knowledge, who works for the sake of sacrifice (for the sake of God), the whole action is dissolved.

Brahmaarpanam brahmahavirbrahmaagnau brahmanaa hutam;
Brahmaiva tena gantavyam brahmakarmasamaadhinaa.
24. Brahman is the oblation; Brahman is the melted butter (ghee); by Brahman is the oblation poured into the fire of Brahman; Brahman verily shall be reached by him who always sees Brahman in action.
COMMENTARY: This is wisdom-sacrifice, wherein the idea of Brahman is substituted for the ideas of the instrument and other accessories of action, the idea of action itself and its results. By having such an idea the whole action melts away.

Daivam evaapare yajnam yoginah paryupaasate;
Brahmaagnaavapare yajnam yajnenaivopajuhwati.
25. Some Yogis perform sacrifice to the gods alone, while others (who have realised the Self) offer the Self as sacrifice by the Self in the fire of Brahman alone.

Gita Chapter 2.36 to 2.40

Avaachyavaadaamshcha bahoon vadishyanti tavaahitaah;
Nindantastava saamarthyam tato duhkhataram nu kim.
36. Thy enemies also, cavilling at thy power, will speak many abusive words. What is more painful than this!

Hato vaa praapsyasi swargam jitwaa vaa bhokshyase maheem;
Tasmaad uttishtha kaunteya yuddhaaya kritanishchayah.
37. Slain, thou wilt obtain heaven; victorious, thou wilt enjoy the earth; therefore, stand up, O son of Kunti, resolved to fight!

Sukhaduhkhe same kritwaa laabhaalaabhau jayaajayau;
Tato yuddhaaya yujyaswa naivam paapamavaapsyasi.
38. Having made pleasure and pain, gain and loss, victory and defeat the same, engage thou in battle for the sake of battle; thus thou shalt not incur sin.
COMMENTARY: This is the Yoga of equanimity or the doctrine of poise in action. If a person performs actions with the above mental attitude, he will not reap the fruits of such actions.

Eshaa te’bhihitaa saankhye buddhir yoge twimaam shrinu;
Buddhyaa yukto yayaa paartha karma bandham prahaasyasi.
39. This which has been taught to thee, is wisdom concerning Sankhya. Now listen to wisdom concerning Yoga, endowed with which, O Arjuna, thou shalt cast off the bonds of action!

Nehaabhikramanaasho’sti pratyavaayo na vidyate;
Swalpam apyasya dharmasya traayate mahato bhayaat.
40. In this there is no loss of effort, nor is there any harm (the production of contrary results or transgression). Even a little of this knowledge (even a little practice of this Yoga) protects one from great fear.
COMMENTARY: In Karma Yoga (selfless action) even a little effort brings immediate purification of the heart. Purification of the heart leads to fearlessness.