"Nothing is deeper in man than his skin," said the French poet and writer Paul Valéry. Our skin is so much more than a surface that separates our body from the outside world. It's like an open book, a doorway into our soul. It tells of our happiness, our fears, our sufferings, and the passing years. When we listen to our skin, understand what it's saying, and know how to take care of it, we have the keys to make it glow with health.