Clive Staples

"I do not of course mean that the words 'Thy will be done' are merely a submission.  They should, and if we make progress they will increasingly, be the voice of joyful desire, free of hunger and thirst, and I argue very heartily that to treat them simply as a clause of submission or renunciation greatly impoverished the prayer.  But though they should be something far more and better than resigned or submissive, they must not be less; they must be that at least.  And as such they necessarily discipline all the succeeding clauses." 

C. S. Lewis~ Petitionary Prayer: A Problem Without an Answer