This is my third JMC book, and although I still really enjoy his writing style, I felt like this discussion of work/rest lacking nuance, and in many instances, I disagreed with the advice he seemed to offer.
For starters, I disagree with the way that JMC defines work. He seems to imply that if work is not providing internal fulfillment, perhaps it is time to find a different, more fulfilling career. He urges the reader to quit their job in only the first few pages of the book, and suggests that his friend's depression might be cured if he were to find more fulfilling work. However, most people do not go to work for a sense of fulfillment. Another common way that people refer to a job is as a "living". (How do you make a living?) Most people go to work, simply, to feed and clothe themselves. David was not tending sheep for personal fulfillment; Jesus did not do carpentry to give his life meaning, and Paul did not make tents because he felt like his tents were a meaningful contribution. Work has always been a means to provide for ourselves and our families, it wasn't until very recently, in very affluent circles, that work became a means to fulfillment and happiness. Although JMC seems to present them as universal truths, personal fulfillment and individual identity are very Western, post modernist ideas that were not present in the Biblical stories. God's redemption of "work" doesn't mean he wants us to quit a soul sucking job for a more fulfilling one. Rather, it is his promise to provide for us-- that we can now live with hearts of generosity rather than scarcity.
Sabbath/rest also stem off the same ideas of generosity and abundance. Yes, Sabbath is a day, an ancient, weekly holiday, and I do believe that Christians today are invited to participate. However, I also think that in the redemption of Sabbath through Jesus, it is much more than a ritual or outward sign, but a heart posture. It is the daily, hourly practice of resting in Jesus and living in abundant, rather than scarce, time.
JMC's discussion of good jobs vs. bad jobs also lacks depth. Although JMC tries to convey that all jobs can be edifying, readers can easily tell that he decidedly dislikes jobs in social media, investment banking, military because they go against his own ethical principles and biases. However, he fails to mention that pretty much any job we work, even if it is for a nonprofit, will have some unethical components. Personally, I work in healthcare, and through my job, I actively participate in all the ways that the system causes devastating medical debt, traumatizes patients, and unnecessarily overmedicates people. Yes, we do good, God glorifying work, but we also cause some of the greatest harms. I wish JMC addressed what it means to be employed in a broken system and be a part of constructing a better, kingdom-leaning system.
Although I have many more thoughts, the last one I'll share is that I think a Biblical vision of work does not refer to our jobs but to our kingdom work. When Jesus called Peter to be a disciple, he said that he was calling Peter to leave his vocation as a "fisherman" to become a "fisher of men". In the same way, God has redeemed work, saying that we no longer need to worry about providing for ourselves but that if we "seek first his kingdom", he will provide for us everything we need. His calling for us is a kingdom vision, and I think that is how we are to approach each earthly vocation we find ourselves in. For example, I have worked in many different settings: warehouses, restaurants, schools, and hospitals. Yet in each setting, God's vocational calling for me has been the same: to see, hear, and love those who feel unseen, unheard, and unloved. This is my personal calling, and while other people may have different callings, I don't think our heavenly vocations are specific to any job title or task but can be lived out regardless of where God physically places us.