Source: The Human Predicament: A Candid Guide to Life's Biggest Questions (1 edn, 2017). p. 20 Top.
There is sometimes also thought to be a connection between meaning and the quality of life. Whether or not this thought is correct depends, in part, on what one means by quality of life. Meaningfulness does seem to be part of a good life10 if that is what one means by quality of life. A life with meaning is, all other things being equal, better than one that is meaningless. However, a meaningless life may be sufficiently good in other ways such that its quality is nonetheless not unusually bad. Moreover, if by quality of life, one means its felt quality, then it is entirely possible for a life that objectively lacks meaning to have a good subjective quality, either because the subject does not care about meaning or mistakenly thinks that his11 life is meaningful. By contrast, when people perceive their lives to be meaningless, there are typically quite profound negative effects on the quality of life.
Assume objective quality: how's the emboldened sentence true? I ask not about subjective quality that's answered in the next sentence.