Suppose you are a salesman. You are working on behalf of that big firm. Now, suppose if you make one million dollars profit, you have no attachment for that because you know that "This profit goes to the proprietor." You have no attachment. Similarly, if there is some loss, you also know that "I have nothing to do with the loss. It goes to the proprietor."
Similarly, if we work on account of Kṛṣṇa, then I shall be able to give up the attachment for the result of the work. Tyaktvā karma-phalāsaṅgaṁ nitya-tṛpto nirāśrayaḥ. Nitya-tṛpta, always satisfied: "Either there is good result or there is bad result, it doesn't matter. I shall remain satisfied in the sense that I am working under the direction of Kṛṣṇa. So I have nothing to think of the result."