[renewiltord]

This is another traditional view but I find it hard to believe the truth of it because of the strong bias (and personal experience): happy people do not generally know they are happy, unhappy people think that doing a different thing is sufficient for happiness.

Personally, I have found fulfillment from menial labour only when I have found no fulfillment from knowledge work. Achievement at the latter beats out the former by a large multiple, and doing the former when I have access to the latter feels me leaving like I've wasted time.