I saw this on another blog but I thought it was worth posting here also.
This is an excerpt from Packer's Praying the Lord's Prayer:
We need to see that the Lord’s Prayer is offering us model answers to the series of questions God puts to us to shape our conversation with him. Thus:
“Who do you take me for, and what am I to you?”
(Our Father in heaven.)
“That being so, what is it that you really want most?”
(The hallowing of your name; the coming of your kingdom; to see your will known and done.)
“So what are you asking for right now, as a means to that end?”
(Provision, pardon, protection.)
Then the “praise ending” answers the question, “How can you be so bold and confident in asking for these things?”
(Because we know you can do it, and when you do it, it will bring you glory!)
Spiritually, this set of questions sorts us out in a most salutary way.