The Blessed Lord said, “sarva-karmany api sada
sasvatam padam avyayam – Ever – sadā engaging even in – kurvānah api all actions, one to whom I am the refuge – madvyapāsrayah, attains – āpnoti the eternal – sāsvatam, immutable – avyayam State – padam through My grace – mat-prasādāt.
mayi sannyasya mat-parah
mac-cittah satatam bhava – Mentally – cetasā surrendering – sannyasya all actions – sarva-karmāni to Me – mayi and accepting Me as the supreme – matparah, have your mind fixed – maccittah bhava ever – satatam on Me by resorting – upāsritya to the concentration of your intellect – buddhi-yogam.
atha cet tvam ahankaran
na srosyasi vinanksyasi – Having your mind fixed on Me – maccittah, you will cross over – tarisyasi all difficulties – sarva-durgāni through My grace – mat-prasādāt. If, one the other hand – atha cet, you – tvam do not listen – na srosyasi out of egotism – ahankārāt, you will get destroyed – vinanksyasi.
yad ahankaram asritya
na yotsya iti manyase
mithyaisa vyavasayas te
prakrtis tvam niyoksyati – That – yat you think –manyase ‘I shall not fight’ – ‘na yotsye’, by relying – āsritya on egotism – ahankāram, – vain – mithyā is – esah this determination – vyavasāyah of yours – te. Your nature – prakrtih will impel – niyoksyati you – tvām!
nibaddhah svena karmana
kartum necchasi yan mohat
karisyasy avaso ‘pi tat – Being bound – nibaddhah by your own – svena duty – karmanā born of nature – svabhāvajena, O son of Kunti, you, being helpless – avasah, will verily do – karisyasi api that – tat which – yat do not – na wish – icchasi to do owing to indiscrimination – mohāt.
[Chapter 18, Slokas 18.56 – 18.60]
Lord Krishna in the above verses instructs Arjuna to do his rightful duty as his own nature of a kshatriya will impel him to act accordingly and to not act out of egotism but instead to engage in all actions seeking refuge in the Lord mentally surrendering all actions to Him accepting Him to be the supreme and have his mind fixed on the Lord to tide over all the difficulties. Lord Krishna says if Arjuna does this, he will attain the eternal immutable State through His grace but if he acts out of egotism and does not follow the instructions as laid out, he will be get destroyed.