quotes from Chapter 10 The Lord's Prayer by Thomas L. Constable
"Perhaps the most revolutionary and shocking thing that Jesus taught in the Lord's Prayer is that when His disciples prayed to God they should think of and address Him as their Father. Nowhere in the Old Testament did the prophets instruct the people of God to think of Him in such a familiar way. They did refer to Him as the father of the nation of Israel as a whole, but never as the father of the individual believer."
"Even though one's earthly father may have been abusive or worse, everyone knows how a father should behave."
"Really the whole purpose of prayer is not to get our will done but to get God's will done."