I love to study suffering and why God allows his children to endure hard times. Here are some great articles and books I have read that have given me a lot of insight on the topic.
Not only so, but we also glory in our sufferings, because we know that suffering produces perseverance; perseverance, character; and character, hope. And hope does not put us to shame, because God’s love has been poured out into our hearts through the Holy Spirit, who has been given to us.
85 Bible Verses About Suffering
Turn My Mourning into Dancing by Henri Nouwen