Nishkama karma refers to work done without expectation of results or reward. One interpretation is that the purpose or "soul" of any action should be to remember God, while subjective perceptions of results are secondary. Remembering God through actions like remembrance (namasmaran) is the most important part of any work, and focusing on potential results means forgetting God and the true purpose of the work. This interpretation can be validated through one's own experiences.