Think of Christ, whose thoughts were so contrary to the religious thought of his time. How difficult to pass from the thought of an ordinary person to the thought of Christ! What difficulties there are to face! But once you fight these difficulties, and the further you advance, the more you are drawn to the spirit by the spirit. This goes on up to a certain limit, and all this time the difficulties are very great, but once you reach the limit everything becomes easy. If only the willpower is in control it will overcome all inertia.