In Haddon Robinson’s booklet on The Lord’s Prayer, he quotes from George MacDonald’s comment on Luke 18:1. The section that Haddon quotes ended with the thought, “God withholds that man will ask.” I thought the quote was so thought provoking that I went back to the original source and am copying what I found here.
“What if he knows prayer to be the thing we need first and most? What if the main object in God’s idea of prayer be the supplying of our great, our endless need—the need of himself? What if the good of all our smaller and lower needs lies in this, that they help to drive us to God?
Hunger may drive the runaway child home, and he may or may not be fed at once, but he needs his mother more than his dinner. Communion with God is the one need of the soul beyond all other need; prayer is the beginning of that communion, and some need is the motive of that prayer. Our wants are for the sake of our coming into communion with God, our eternal need.
If gratitude and love immediately followed the supply of our needs, if God our Saviour was the one thought of our hearts, then it might be unnecessary that we should ask for anything we need. But seeing we take our supplies as a matter of course, feeling as if they came out of nothing, or from the earth, or our own thoughts, instead of out of a heart of love and a will which alone is force, it is needful that we should be made feel some at least of our wants, that we may seek him who alone supplies all of them, and find his every gift a window to his heart of truth.
So begins a communion, a talking with God, a coming-to-one with him, which is the sole end of prayer, yea, of existence itself in its infinite phases. We must ask that we may receive; but that we should receive what we ask in respect of our lower needs, is not God’s end in making us pray, for he could give us everything without that: to bring his child to his knee, God withholds that man may ask.” (George MacDonald: Unspoken Sermon Series; Volume Two)
I hope you find these thoughts from a 19th Century author as helpful as I did.