History and experience tell us that moral progress comes not in comfortable and complacent times, but out of trial and confusion.
历史和经验告诉我们，道德进步不是来自于舒适和自满的时代，而是来自于考验和困惑。
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历史和经验告诉我们，道德进步不是来自于舒适和自满的时代，而是来自于考验和困惑。