What is the purpose of redemptive suffering?

This is a difficult topic for me. I think some times people just have horrible things happen to them and there is no real reason. Please explain the meaning of redemptive suffering and do all Christian faiths believe in this?

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[LIST]
]How do I get God to stop punishing me?
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How can I love God when he allows us to suffer?**
]* Why and how is suffering redemptive?**
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