A deeper end or set of ends can determine the experience of labor in any given direction.
If one respects and/or agrees with the end/s, then labor is pleasurable and one steadily advances in skill and accomplishment. Life becomes more meaningful and generally satisfactory.
Ambivalence toward a given end or set of ends is not entirely gratifying, but one can hum along, do a sufficient job, and achieve one's pleasures outside of work.
And then of course if one disagrees with or has contempt for an end, one steadily becomes more resentful, uncommunicative, uncooperative, and resistant throughout the process. One may even become fearful, or become stricken with terror, if work is wasting time and energy and one's position is dire.
Not really rocket science, I know. Just thought it was worth jotting down.