What is consciousness? How does it arise? Are we conscious of everything we experience? How do we know that we are the owners of what we experience every day, whether through what we eat, think, perceive of the world through what reaches our senses, the way we interact with others, etc.? How does the brain, nature's most efficient organ, help us to know who we are as individuals in a constantly changing world? When we concentrate on the contents of our conscious experiences, which we commonly refer to as the "I", we don't worry or even notice any electrical or neurophysiological activity present in the physical basis of our own consciousness - the brain and body themselves. What seems to us, at first, is that the physical aspects that make it up don't match the more intrinsic qualities of our inner reality: the ability to be free and transform the way we are in the world. This work provides a neurophilosophical vision of the whole process that integrates the conscious and non-conscious mind, the brain, the body and the environment as characteristics that make up man in his unique reality.