Although I am quite weary of so called Kabbalah movements, the concept of prayer presented in this view is not miles away from my own view. The aim of prayer is union with Christ. In God there is no change, neither shadow cast by turning. It therefore seems entirely logical that prayer should change me, and conform my will to that of God, and not be some kind of attempt to change the will of God.
Do you suppose that there is some truth to this understanding of prayer? That God typically responds to our hearts' condition rather than our words, which may not accurately convey our hearts?
Isn't this what the Church teaches? The words we speak in prayer must be accompanied by a corresponding inclination in the heart.
However, one should not downplay the importance of the words we use when praying. Our Lord teaching us the "Our Father" was a response to "Teach us how to pray." The words of the prayers of the Church teach us how we should approach God, and again help us to change our hearts and minds to conform to His will.