Why do bad things happen to good people? Good question. It can't be Karma because they only do good deeds. It's probably because good people on average tend to be "too good" for their own good Nature punishes weakness. No place for a passive attitude in life. You will be consumed
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Do good despite not being rewarded. Can you do that? Can you live like that on a long term basis? Can you do good without expecting in return? This will prove character.
I think if you do good, good things back to you. But. Your too good in general, you will be exploited.