An interpretation from Bhagwad Gita:
A man who works for himself or for others or for God. In these three cases, he does things for himself, he does things for others and he does things for God. IN the first two, some metric is defined for success but when he works for God, that success metric is NOT defined or unknown or will not be realized in a quantitative sense. Working for himself makes one selfish but working for others or for God, it makes himself unselfish.
One goes from attachment to semi detachment to total detachment in these three scenarios.
Gita also talks about motiveless result that goes against any business objective of the today’s corporate world – simple put, grow your expertise, your skills (like a soldier has to be fit and should practice his skills daily for an eventuality) and pretty much results would follow. Your skills and expertise applied properly will eventually lead to a guaranteed result.
Same way, three kinds of adversity: Adhyatmika, arising from disorder of the body, Adhibhautika, arising from external objects such as tigers, snakes, road accidents etc, and Adhidaivika, arising from the action of great cosmic forces, such as those that cause natural disasters. A man who is not perturbed by any adversity and who is free from attachments is the wisest of them all.