As Rupa Gosvami recommends, a devotee is not neglectful in worldly dealings. But at the same time, he deals with the material world only as much is necessary – not more and he detaches himself from the material world as much as possible.
Lecture on Real Success Stories Are in Srimad-Bhagavatam (SB 8.4.15; Ljubljana, Slovenia, 26 Dec 1998)
A devotee lives in this world, but his attention is not on this dream world. His attention is fixed on the reality of the spiritual world.
Lecture on Real Success Stories Are in Srimad-Bhagavatam (SB 8.4.15; Ljubljana, Slovenia, 26 Dec 1998)
A devotee doesn't simply negate everything, but sees everything in relation to Krishna. That is the devotee's way of seeing the world – not simply reject, but use everything in Krishna's service.
Lecture on Real Success Stories Are in Srimad-Bhagavatam (SB 8.4.15; Ljubljana, Slovenia, 26 Dec 1998)
They are very enthusiastic to sell more and more Coca-cola. They are always thinking how to increase our business: "When will that day come when there isn't a person in the world who isn't drinking Coca-cola every day?" They are always meditating, always ambitious. So, devotees should be similarly ambitious: "When will that day come when there is not a person in the world who is not chanting Hare Krishna?"
Lecture on Real Success Stories Are in Srimad-Bhagavatam (SB 8.4.15; Ljubljana, Slovenia, 26 Dec 1998)