自分で充実しない一日を作るのは、とても難しい。
頑張って、充実しない一日を作ることができても、
充実しない一日を作れた充実感を味わってしまう。
It is very difficult to make a non-fulfilling day for yourself.
Even if you do your best to make a non-fulfilling day, you will still experience the fulfilment of having made a non-fulfilling day.