The folliness of God’s people

There was a pastor who had served in one place and received one question: “I have served in this church as an assemblyman for 20 years. I have also served Sunday school for children. During the past 20 years I have also had a lot to do with the construction of church buildings. My wife and children all come to worship in this church. Almost never every Sunday we skip church, unless we are very forced or sick, so we always worship in this church. My wife and children are also involved in various ministries in this church. But why did God give my grandson to get cancer? Many people experience things like this, in their minds, they will complain to God. Although on the one hand we can understand that this is a natural response if we are experiencing great difficulty. But behind this question there is a very wrong understanding.