I'm not really educated in philosophy unfortunately, but anecdotally I find it to be true. Last year around this time my wife got laid off from her job. Luckily for me, I'm in an industry where I can just work until I collapse because the hours are available.

I started putting in 55 to 60 hour work weeks every week, this was m-f so I was doing 11 to 12 hiur shifts daily. Every day on my way to work, instead of dreading my upcoming day, I forced myself to be thankful. My entire drive to work is would just keep listing all the things I was thankful for, 20 minutes a day everyday.

When times were good, I was always reminded myself that nothing lasts forever, and to be prepared for when something falls apart, and we made it through that rough patch just fine.

I was able to keep that up for several months, while still being supportive to my wife who was pretty devastated by being unemployed. Now we're better off than before, and I'm already preparing for the next catastrophe.