The first supernatural light upon nature is the light of precept: God commands or forbids something that the mind itself can recognize as right or wrong.  Telling us what we already know or could have known may seem superfluous.  Yet, as equatorial sunlight prickles the skin, so revelation prickles the mind and wakes it up, and it does this in several different ways.

Continuing my reply to yesterday’s letter from a student:

Your second question is about what you call “moral miracles.”  Can God make it right to do what is intrinsically wrong, just by commanding it?  This question arises especially for those who not only accept natural law, but also accept the Bible as authentic divine revelation.