सर्वधर्मान्परित्यज्य मामेकं शरणं व्रज।
अहं त्वा सर्वपापेभ्यो मोक्षयिष्यामि मा शुचः।।18.66।।
Sarva Dharman Parithyajya Mamekam Saranam Vraja
Aham Tva sarva papebhyo Moksha ishyami Maasucha:
Abandon all varieties of dharmas and simply surrender unto me alone. I shall liberate you from all sinful reactions; do not fear.
In the Bhagavad Gita, Shree Krishna gave Arjun sequentially higher instructions. Initially, he instructed Arjun to do karm, i.e. his material dharmaas a warrior (verse 2.31). But material dharma does not result in God-realization; it leads to the celestial abodes, and once the pious merits are depleted one has to come back. Hence, Shree Krishna next instructed Arjun to do karm yog, i.e. his material dharma with the body and spiritual dharma with the mind. He asked Arjun to fight the war with the body and remember God with the mind (verse 8.7). This instruction of karm yog forms the major portion of the Bhagavad Gita.
Now in the very end, Shree Krishna instructs Arjun to practice karm sanyās, i.e. renounce all material dharma and simply adopt spiritual dharma, which is love for God. He should thus fight, not because it is his duty as a warrior, but because God wants him to do so.
Simply,in today’s world we should understand that this verse is giving assurance of complete undertaking of our entire life (on golden paper bond) from Almighty.So,we don’t need to worry,no need to find various types of religious shelters and so on.We have to just perform our duty sincerely with full dedication and integrity and then psychologically (i.e. mentally) completely surrender to the almighty.