SB 3.29.25

Worship of the Deity of the Supreme Personality of Godhead is prescribed herewith even for persons who are simply discharging their prescribed duties. As we have explained before this, that there are prescribed duties of different classes of men-the brahmanas, the vaisyas, the ksatriyas, the sūdras-and different asramies [sic]-brahmacari, grhastha, vanaprastha, sannyasi. So as they have got different prescribed duties, so by the result of such prescribed duties one has to worship the Deity of the Lord, and such worship of the Deity of the Lord is not successful till one does not appreciate the presence of the Lord in every living entities. In other words, one should not be simply satisfied by discharging his duties properly. He has to realize his relationship with the Supreme Personality of Godhead and the relationship of all other living entities with the Supreme Personality of Godhead. If he does not understand this truth of his relationship with the Supreme Personality of Godhead, then even though he properly discharges his prescribed duties, it is to be understood that simply he is laboring without any profit.

The words sva-karma-krt is very significant in this verse (s-w-a k-r-m-a k-r-i-t). Sva-karma-krt means one who is engaged in discharging his prescribed duties. It is not that because one has become a devotee of the Lord or one is engaged in devotional service, therefore he should give up his prescribed duties. In other..., Purpose is that in the name of devotional service nobody should be a lazy man. He has to execute devotional service by the result of his prescribed duties. So sva-karma-krt means one should discharge his duties also. They should not neglect the duties prescribed for him.