Words said without heart are as utterly useless to our souls as the drumbeating of the poor heathen before their idols. Where there is no heart, there may be lip-work and tongue-work, but there is nothing that God listens to; there is no prayer. Saul, I have no doubt, said many a long prayer before the Lord met him on the way to Damascus. But it was not till his heart was broken that the Lord said, "He prayeth."
Taken from the book A Call to Prayer by JC Ryle 1816-1900