It is inconceivable to think that God has to explain Himself to us.
He has told us as much as we need to know. We will not have the capacity to understand things until we are with Him in Glory. In the meantime, He owes us no explanations.
There is no rest other than to acknowledge that God is faithful to His own Word and knows that is best. For that matter, if He answered prayer according to our concepts, we would miss out on much He has for us.
There is a time when the Soldier of The Cross decides that anything the Lord wants is the best thing, no questions asked. This is only possible when there is a prayer life that is in agreement with God's Word. Of course, that can't happen unless there is the systematic taking in of The Word.
What is the result of faith in a life?
Freedom.
Confidence.
Sight.
Peace.
Contentment.
The tackling of the impossible.
The recognition of God.