Moksa Opadesa Yoga: Bhagavad Gita Chapter 18 [Final Revelations of the Ultimate Truth]
Krishna Said > Shaloka: 26
The worker who is free from all material attachments and false ego, who is enthusiastic and resolute and who is indifferent to success or failure, is a worker in the mode of goodness.
A person in Krishna consciousness is always transcendental to the material modes of nature. He has no expectations for the result of the work entrusted to him because he is above false ego and pride. Still, he is always enthusiastic till the completion of such work. He does not worry about the distress undertaken; he is always enthusiastic. He does not care for success or failure; he is equal both in distress or happiness. Such a worker is situated in the mode of goodness.