Bhagavad Gita 2.48 sharpens the idea further. Do the work completely, but do not let your identity cling to the result. Effort belongs to you; outcome does not.
That is the reason this verse stays so relevant. People often let praise, rejection, success, or failure decide how they feel about themselves. Krishna breaks that habit. He says the work can stay serious even when the ego stops demanding constant approval.
The word Yogasthah makes that instruction feel practical. It points to a person who is anchored in inner balance. The mind still moves, but it is no longer dragged around by craving, fear, applause, or rejection. You train that steadiness by returning attention again and again to breath, posture, mantra, or the task in front of you. That repetition is not a weakness in the method. It is the method.