>Don't take it all too seriously, we all die.

Wise wisdoms overall, to have this particular advise from someone who has passed away just hit a different notes.

There's an old Chinese proverbs on being happy:

"If you want to be happy for an hour, take a nap. If you want to be happy for a day, go fishing. If you want to be happy for a year, inherit a fortune. If you want to be happy for a lifetime, help someone else".

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He was not writing abstractly about mortality; he knew exactly what it meant

I don't think he had his diagnosis when he wrote this.