The best support for faith is the guarantee that if we ask our Father for bread, he does not give us a stone. Quite apart from explicit religious belief, every time that a human being succeeds in making an effort of attention with the sole idea of increasing his grasp of truth, he acquires a greater aptitude for grasping it, even if his effort produces no visible fruit. An Eskimo story explains the origin of light as follows: “In the eternal darkness, the crow, unable to find any food, longed for light, and the earth was illumined.” If there is a real desire, if the thing desired is really light, the desire for light produces it. There is a real desire when there is an effort of attention. It is really light that is desired if all other incentives are absent. Even if our efforts of attention seem for years to be producing no result, one day a light that is in exact proportion to them will flood the soul