This essay collects, with as much modesty as ambition, a spiritual itinerary for the man and woman of today. An essential rereading, as simple as it is profound, of the legacy of Christ, beacon of humanity. The gospel as a map of consciousness and as a permanent existential provocation. Biografía de la luz is a text designed for all spiritual seekers and, therefore, written from a cultural rather than a confessional perspective. A path, as radical as possible, for enlightenment, understanding it as something simple and everyday. A kind of poetic manual of interiority, in which some of the countless images and metaphors outlined by the evangelists are presented, which are authentic mirrors of human identity. A book to review life itself and to discover, behind the noise of the shadows, that we would not seek the luminous if we were not, after all, beings of light. In the vein of his previous literary installments –El forgetfulness of oneself, Enthusiasm, the acclaimed Biography of Silence… - Pablo d 'Ors is now giving us his definitive work. We all need reflections like these, so transparent: stories that help us to see things again as they are. As we surely saw them when we were children. Images and ideas that make it clear that life is not far or outside, but inside and here.