Stanza 41:
अपूर्यमाणमचलप्रतिष्ठं समुद्रमापः प्रविशंति यद्वत् ।
तद्वत्कामा यं प्रविशंति सर्वे स शांतिमाप्नोति न कामकामी॥
Just as the static sea is undisturbed by the innumerable rivers joining it, the person established in the EVEN state of mind ( Yoga ) is not carried away by the worldly affairs and desires, and such a person will enjoy the supreme peace. This is not attainable by a person plagued by desires.
Stanza 42:
विहाय कामान्यः सर्वान्पुमांश्चरति निःस्पृहः ।
निर्ममो निरहंकारः स शान्तिमधिगच्छति ॥
He who has given up his ego, emotions, not attached to desires ( unrighteous, improper, immoral desires ), and EVEN minded, such a person is entitled for peace.
Stanza 43:
ज्यायसी चेत्कर्मणस्ते मता बुद्धिर्जनार्दन ।
तत्किं कर्मणि घोरे मां नियोजयसि केशव ॥
Arjuna said “ Krishna, if this intellectual evolution ( yoga through knowledge ) is better than the evolution through ACTION (karma yoga), then why are you pushing me to karma yoga which may bind me in the bondage of karma ? ”.
Stanza 44:
न कर्मणामनारंभान्नैष्कर्म्यं पुरुषोऽश्र्नुते ।
न च संन्यसनादेव सिद्धिं समाधिगच्छति ॥
Krishna said “ Yoga cannot be attained merely by knowledge alone (Jnana Yoga) if there is an intention to give up Action ( Karma yoga ). Similarly, merely performing Action without the knowledge of how to perform Action without getting into the bondage of karma, Yoga cannot be attained. ( Both are complimentary to each other for attaining yoga ).
Stanza 45:
तस्मादसक्तः सततं कार्यं कर्म समाचार ।
आसक्तो ह्याचरन्कर्म परमाप्नोति पूरुषः ।
Therefore, perform action without attachment of desires to it. Such a karma yoga will lead you to the Supreme Being.
Stanza 46 :
कर्मणैव हि संसिद्धिमास्थिता जनकादयः ।
लोकसंग्रहमेवापि संपश्यन्कर्तुमर्हसि ॥
Even people of great Knowledge ( Jnana Yoga) like king Janaka, though attained the highest, continued to do selfless Action. Doing action ( Karma yoga ) for the wellbeing of the world is the appropriate thing for people like you.
Stanza 47 :
यद्यदाचरति श्रेष्ठस्तत्तदेवेतरो जनः ।
स यत्प्रमाणं कुरुते लोकस्तदनुवर्तते ॥
Whatever the great people do, the common people will also follow that because they think it as a standard measure.
Stanza 48:
सक्ताः कर्मण्यविद्वांसो यथा कुर्वंति भारत ।
कुर्याद्विद्वांस्तथासक्तश्चिकीर्षुर्लोकसंग्रहम् ॥
Just as people of desires and attachments do Action for their own purposes, the people of knowledge will also do Action for the well being of the world.
Stanza 49:
मयि सर्वाणि कर्माणि संन्यस्याध्यात्मचेतसा ।
निराशीर्निर्ममो भूत्वायुध्यस्वविगतज्वरः ॥
Therefore, surrender your mind to ME , the Supreme Being, which is also in you, and fight the war without desires, emotions, and any regret (only as your duty as a warrior to uphold righteousness).
Stanza 50 :
इमं विवस्वते योगं प्रोक्तवानहमव्ययम् ।
विवस्वान्मनवे प्राह मनुरिक्ष्वाकवेऽब्रवीत् ॥
I imparted this knowledge of yoga to sun God in the beginning of the creation. Sun God imparted this knowledge to Manu and Manu to his son Ikshwaku.
Stanza 51:
एवं परंपराप्राप्तमिमं राजर्षयो विदुः ।
स कालेनेह महता योगो नष्टः परंतप ॥
This knowledge of yoga was passed on from generation to generation, and gradually disappeared in this world with the passage of time.
Stanza 52:
अपरं भवतो जन्म परं जन्म विवस्वतः ।
कथमेतद्विजानियां त्वमादौ प्रोक्तवानिति ॥
Arjuna said “ You are a person of recent origin. Sun God was born in the beginning of the creation. Then, how could you impart this knowledge to Sun ” ?
Stanza 53 :
बहूनि मे वृतीतानि जन्मानि तव चार्जुन ।
तान्यहं वेद सर्वाणि न त्वं वेत्थ परंतप ॥
Lord Krishna said “ You cannot remember all the innumerable births you have had, but I know all my manifestations ”.
Stanza 54 , 55 & 56 :
अजोऽपि सन्नव्ययात्मा भूतानामीश्वरोऽपि सन् ।
प्रकृतिं स्वामधिष्ठाय संभवाम्यात्ममायया ॥
यदा यदा हि धर्मस्य ग्लानिर्भवति भारत ।
अभ्युत्थानमधर्मस्य तदात्मानं सृजाम्यहम् ॥
पवित्राणाय साधूनां विनाशाय च दुष्कृताम् ।
धर्मसंस्थापनार्थाय संभवामि युगे युगे ॥
I am the unborn, indestructible forever by my nature, and the MASTER of the creation. I manifest using my own nature as and when there is decline in Righteousness ( Dharma ) in the world and re-establish it. Also to eliminate unrighteous people who are sinning, and to protect good and righteous people.
Stanza 57:
जन्म कर्म च मे दिव्यमेवं यो वेत्ति तत्त्वतः ।
त्यक्त्वादेहं पुनर्जन्म नैति मामेति सोऽर्जुन ॥
Arjuna, he who realises that my manifestations and actions are divine and transcendental, in perfect sense, such a person will reach ME after death and shall not be reborn (because he knows the art of right action which does not bind him in karma).