The saints were not people with the greatest education or even the largest results. But they did have a couple traits in common which were almost invisible: ehat they SAID correlated almost one hundred percent with what they WERE and what they DID. An amazing and invisible power may be released when a person's words and inner self finally match.
There is no progress in prayer without progress in faith, a purification of faith. And this entails the removal of all the props which depend on human endeavor, human reasoning, signs and the rest. It is the naked faith which is a terrifying experience and yet is the meeting point ultimately between God and ourselves in the depth of our being. This experience of the purification of faith is not normally one which comes early in the spiritual life. We must learn to wait.