The living substance of the universe with which, as tradition states, God created the world and, a few years ago, an amazing means of exploration and action, thanks to the application of laser, light offers us a field of infinite possibilities both on the material level and on the spiritual level. It is the spiritual potential of light that Omraam Mikhael Aivanhov invites us here to discover: The light that is protection, nourishment, instrument of human, nature and God's knowledge, but above all, a unique and truly effective means to transform ourselves and the world.