Bad Night

It seems that all of my bad nights are when I dream about my work in the late 1900s. I guess you would call them nightmares, but to me they are very realistic as I relive those days. Thankfully, I no longer created such memories after I retired.
I wonder what Zen Monks dream about. They are always referring to days of calm and joy in their writings. Have you ever heard or read about their dreams?
Interesting to hear that others have dreams or in my case, nightmares, about aspect in life, even 40 years ago,
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