The man is immersed in the natural forces of the universe, not as a stranger who contemplates it from the outside, but part of this nature which is committed daily and the long march. Hence the philosophy of nature is profound dialogue between man and the world from a mutual interaction involves active. Not enough to live the daily life of the moment, but must be introduced into the layer beyond what someone has called "the unbearable lightness of being." This dialogue with nature has had its history since man has possessed the ability to think. In every scientific discovery man has made his little dialogue in the course of the great dialogue that is underway. In this work of philosophy of nature is reflected the process of small and great dialogue by philosophers and scientists classical, medieval and modern. The current philosophy of nature leads us to propose in the third part of this work three statements: a questioning world, a world to understand, a world transform.