jnatva mam shantim rcchati
"A person in full consciousness of Me, knowing Me to be the ultimate beneficiary of all sacrifices and austerities, the Supreme Lord of all planets and demigods, and the benefactor and well-wisher of all living entities, attains peace from the pangs of material miseries."
Arjuna asked in the beginning of Chapter 5, after mentioning that he was confused with the words Karma sanyasam and Karma yoga, that is Gyana yoga and Karma yoga, which was beneficial to him. Sri Krishna in reply has been advising that Karma yoga was good for him as it was easy and yielded result quickly. To top the advantages of Karma yoga, Sri Krishna tells a very important message in this sloka. This is the only sloka in this Chapter, wherein He mentions His connection with the Karma yoga. He says that Karma yoga is Aradhanam [pooja] for Him. In this world all Yajna = yagna or homam or yagam, tapasam = meditation, performed, bhoktaram = objective or beneficiary, is Sri Krishna. Here we may have a doubt, that Hiranyakasipu and Ravana did tapas and propitiated Brahma to grant deathless life. Bot here we are talking about the meditation and yagna for attaining Moksham, and in such cases, the ultimate beneficiary is Sri Krishna. Now He mentions three things. Many perform yagna in many places, but all finally reach Sri Krishna. Why? Sarva = all, loka = worlds and the people residing in all these worlds, Maheshvaram = the greatest Isvara, is Sri Krishna. So, who ever does any yagna to propitiate any god, the Lord, as the Antaryami or Inner power in all of them and commanding them, gets the offerings and so is the Ultimate beneficiary in all poojas performed. Ishvara means, Isha = commanding power, vara = that is natural . So the Lord has the natural commanding power. He is the Lord of all and commands all. Sarvabhutanam = for all creatures or living beings, suhridam = welfare. Sri Krishna does good only for all. Mam = [such] I [Sri Krishna]. The 'I' here denotes the great Commander He is and the great Donor He is capable of granting anything to anyone. Jnatva = understanding [Sri Krishna], rcchati = attains, shantim = peace. Person who understands Sri Krishna [ as the Ultimate beneficiary, as the One who is for the welfare of all living creatures and as the Greatest among all] and performs pooja, will attain peace. Normally, when we do a work we get tired. Then, how by doing Karma yoga will get peace? Yes, it will give peace if we dedicate it to Sri Krishna. He is our Lord and so we can never grudge to serve Him. He says He is for our welfare. So, we also feel happy to serve Him. He is the greatest Donor and is prepared to grant whatever we wish, including Moksham. This also makes us to serve Him happily. All these induce us to serve Him happily and we get peace. Our duties to our children are not burden to us. A mother does not hesitate for the labor pain. We are happy to undergo medical treatments so that we can be healthier. So also Karma yoga, recommended by the Lord, will never make us tired, rather it will give us peace and happiness.