Good Charlotte had a hit song called Little Things which was about the trials and tribulations of high school students. The chorus talks about the little things that always hang around, and try to bring us down. They just won't go away, and the little things have made them who they are today. All the things that have happened to them, testing them, angering them, and bothering them during their lives have helped shaped their characters.
How we react to and deal with people and circumstances in our lives is largely determined by what has happened to us in the past.
In a perfect world, the kind God intended us to live in, we would have been raised in a loving environment by parents who loved God and considered child rearing both a joy and a privilege. Their job was to disciple their children and impart to them the Godly wisdom which they themselves had accumulated from a lifetime of service to God and others.
In the real world, many people have no such Godly influence in their lives. Their parents have still passed on their values but they often aren't even close to God's standards. So sin and its vile consequences are perpetuated through the generations.
Praise God this cancer in our society can be cured. The cycle of sin can be broken when we repent of our sins and give our lives to Christ. Then the healing can begin and all the little things which come along to test and trouble us, will become reasons for us to praise and thank God, and things which he can use to mould us into the image of his Son, the Saviour, Jesus Christ.