What does Martin Luther King mean by "Continue to work with the faith that unearned suffering is redemptive?"

2 answers

First of all, take those words apart.
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What does he mean by each word or phrase:

"unearned suffering" = ?

"redemptive" = ?

"faith" = ?

Let us know what you think.
He seems to be telling his followers to continue believing in God and in their civil rights cause. They didn't deserve to suffer, but they will prevail -- both here on earth and in heaven.