God may use the pain of your past for His purposes in the present.
Who is better to comfort someone with cancer than one who has had cancer? Who is better to council someone going through divorce than one who has been divorced? Who is better to help someone kick their addiction than one who has been addicted. If God has brought you through a painful experience, look for a way to use that experience to comfort someone today.
So then, those who suffer according to God's will should commit themselves to their faithful Creator and continue to do good.