The term sacred science may appear contradictory to those for whom "science" is identified with that particular mode of knowledge which has come to monopolize to a large extent the term science for itself since the 17th century in the West. Science, thus understood, has by definition nothing to do with sacred, while what is called sacred has little to do with science. This work presents basic notions concerning the sacred sciences and the meaning of such sciences in ths modern world. In the words of the author, "we hope ...that the work will be a humble contribution to a better understanding of the traditional and sacred sciences so much needed by the modern world, lost in the maze caused by its forgetfulness of the traditional and perennial wisdom of which these very sciences are applications and depositories".