While reading what Pastor John Piper wrote on Job and his three friends, I came across this very interesting quote:
"What we learn is that God wills to do some things in answer to prayer that he wants to do, but will not otherwise do. And we should be diligent to pray for others whose prayers for themselves may not be accepted for reasons we do not know. It means we may be the appointed means of someone escaping the consequences of their folly, which they may be able to escape in no other way."
The Strange Way God Arranges to Forgive