I'm looking for the Japanese origin of the saying
Normal is the most difficult.
I believe the longhand version would be
Normality in life is the most difficult state/condition to attain/sustain.
Any idea what the original in Japanese may be?
I've heard this sentence in English many times from a Japanese person from Nagasaki area (Kyushu), so I guess it was a translation of a Japanese saying or a proverb. Would be great to know what the original sounds/reads like.