And there came to him the Pharisees and Sadducees tempting: and they asked him to shew them a sign from heaven. But he answered and said to them: When it is evening, you say, It will be fair weather, for the sky is red. And in the morning: Today there will be a storm, for the sky is red and lowering. You know then how to discern the face of the sky: and can you not know the signs of the times? [Matthew 16:1-3] A concept that may not find easy favor with some Catholics is