Hedonic Treadmill
You work run on a treadmill of pleasure (hedonism is pleasure). But as you grow tired, you have to keep working to maintain that level of pleasure.1 Pleasure in this case is happiness.
Self-esteem is a god that can't be pleased.
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“Hedonic Treadmill | Psychology Today.” Accessed October 5, 2022. https://www.psychologytoday.com/us/basics/hedonic-treadmill. ↩