The Jews, a better known Non-Christian Religion, view suffering as a lesson that they need to learn from God. Ever since the fall of Adam and Eve, Jews went thorough a cycle that starts with Innocence (Humans were perfect before the fall,) then Enslavement (be it Sin or Otherwise,) Promise, struggle, peace, then back to enslavement. This suffering leads to a reasoning the Jews must make in order to understand what God is trying to tell them.