More than 20 years ago, my seniors at work told me that “how I feel happy is determined by the differential value”, and I was impressed that it was an interesting cut.
For example, if you live happily with four family members but something doesn’t improve, it’s difficult to continue to feel the same happiness. To put it more plainly, I feel a little unhappy when my monthly income of 2,000,000 yen drops to 1,800,000 yen, but I am very happy when my monthly income of 300,000 yen becomes 400,000 yen. “Right shoulder rise” is a differential value plus to feel happiness.
“Drunk differential value” can be applied to alcohol intake. At first, you can get drunk with only a little increase in alcohol blood level with beer, but when the increase is zero (blood level is constant), the differential value becomes 0, and it is not so fun. Therefore, you can get drunk for a long time with sake (Japanese wine) with high alcohol concentration, sho-chu, and finally whisky (differential value is positive) (although of course there is a limit). However, if you pay attention only to the differential value, you will be in a coma at the end, so you need to go to bed early when you enter differential mode. On the other hand, when the blood concentration differential value is negative, the body feels stress (the activity of the sympathetic nerve increases) and discomfort such as palpitations occurs, so it is safe to spend time sleeping.
In the era of the bubble (1985-1995), salaries often rose, and I think that the happy differential value of the Japanese as a whole was high, but in the last 20 years, salaries often fell mainly among salary earners as shown in the figure below, and I feel that there were many times when the happy differential value was negative. If your salary is a barometer of happiness, you’ll end up with “unhappiness” for the past 20 years.
If you put the standard of happiness on the economic side, it becomes an unsightly situation because it becomes a state where “greed induce greed”, so it may be a good practice to focus on pursuing the richness of the spirit in addition to the wisdom of past predecessors.
In the Chinese classic, Sai-kon-tan says, “Usual people enjoy the satisfaction of their hearts, so it becomes rather painful for the heart to seek fun. People who reach the road are looking forward to overcoming suffering, so they get fun thanks to suffering. It is very interesting to think about balancing human nature with mental health.