"Openly appearing to those who look for Him with all their heart, while hiding from those who run from Him with all their heart, God governs human knowledge of His presence. He gives signs that are visible to those who search for Him, and yet invisible to those who are indifferent to Him. To those who wish to see, God gives sufficient light; to those who do not wish to see, He gives sufficient darkness."
-- Blaise Pascal (as quoted in Everyday Saints)