Summary: Suffering. It's part of the human experience, and for the believer, there's an even greater purpose - to mold and shape us into who God wants us to be. Perhaps one of the reasons that we don't suffer more than we do, is that we're not patient enough to suffer. And one of the reasons we get into trouble, is we usurp suffering with trying to "fix" it, rather than trusting God in faith that He'll see us through the suffering!
