'Show me clearly that when you tell me that such and such an inspiration exists in your conscience, you are not telling a lie. You say that you feel this persuasion within you. But why am I bound to believe you? Is your word so powerful that I am forced under its authority to believe that you think and feel what you say. . . Show me clearly that these inspirations that you pretend to have are of the Holy Spirit. Who knows not that the spirit of darkness very often appears in clothing of light?'
St. Francis de Sales