This quote by Robert Louis Stevenson encourages a shift in focus from immediate results to long-term efforts and growth. The idea is that instead of judging your day by what you have accomplished or gained (the "harvest"), you should evaluate it based on the efforts you’ve put in (the "seeds" you’ve planted).
In life, not every day will yield visible success or rewards. However, the small, consistent efforts you make—whether in work, relationships, or personal growth—are like seeds that will eventually bear fruit over time. The quote suggests valuing the process and the potential for future success rather than just the immediate outcomes. It’s a reminder to be patient and trust that the efforts you make today will contribute to future achievements, even if they aren’t immediately apparent.