The secret melody, this is the one we listen watching the vastness of the sky, wondering who is the architect, and what was his project when he wrote the score. As in his works, Xuan Thuan starts with a little history. Geocentrism that dominated occident, both under the influence of Aristotle, Ptolémée.et of the Old Testament, has quickly given way to lhéliocentrisme successively, the determinism of Newton and Laplace, to finally reach the cosmic revolution twentieth century, Einstein and relativity, with Planck, Bohr, Heisenberg and dincertitude principle of quantum mechanics. Sinterroge author on the origin of the Universe. How from nothing, can we create matter? The author evokes the notion of particles that arise from quantum nothingness thesis resume some chaos theorists, like Prigogine. The author then tells the Big Bang theory, which was long rejected by physicists convinced atheists, like Hoyle, finding it too close to the biblical Genesis; how this theory was confirmed by the detection of the fossil radiation and observing the content of hydrogen and helium in the universe. Finally, the author of sémerveille constant fine tuning necessary for the emergence of life in the universe. From there, it sécarte of scientific objectivity to assert his profession of faith. He rejects all assumptions involving The intervention of chance, including that of Everett and the multiverse deliberately ranks among the strong lanthropie theorists, noting that "our universe is unique and so accurate setting for the appearance of an observer it can not be the only matter of chance but is the expression of a subtle organizing principle that is manifested in the laws of nature. " The reader who would have read other of his works, like "The cosmos and the lotus" will have a feeling of deja vu since it contains the same concepts. By the author of discharge, we must put this unfortunate redundancy on account of publishers who, delighted with the success of his first books, writing den lont pressed even after the substance has been exhausted.