In many ways, The Book of Ruth is a gentle echo of The Book of Job. In Job, we witness a righteous man destroyed for a wager who remains unwavering in his faith right up until he asks, "But why?" The Book of Ruth is also about a life interrupted by Divine Intervention. It's Job with a happier ending, but the same unsettling questions about how we interact with God, and how God can interact with us.
One of my favorite passages in the entire Bible is Job 42:3: "Therefore I have uttered what I did not understand, things too wonderful for me, which I did not know."