Philosophy and mysticism represents the culmination of the philosophical ideas of its author. Taking as a thread the birth and development of philosophy in Greece, Salvador Pániker exposes his concepts of "the retroprogressive", "critical process" or "mystical". All from an interdisciplinary perspective and through a permanent dialogue with the great currents and figures of universal philosophy. The book therefore concerns both the students of the Greek phenomenon and the readers interested in interpreting the signs of the present times. It is about understanding ourselves, simultaneously, to the Greeks and to us. It is interesting to elucidate, in general, the articulation between philosophy and mysticism. Mysticism is, for Paniker, the culmination of critical reason. Mysticism is lucidity. Nothing to do with ideological / theological constructions. Mysticism is also intramundane. Mysticism surpasses the fundamental vice of humanism, the isolation of the self, because "it is about transcending, leaving the prison of the ego, and turning to something that one cares more than oneself". Mysticism dilutes any question about the meaning of life. In one way or another, while life lasts, all "we do not have standing." The Greeks invented the most civilized way of "standing up": transcending in language and in the polis. And in the exercise of an inexhaustible curiosity. His lesson is enduring; but today we can broaden the framework: "To stand up is a retroprogressive pirouette, an act both personal and transpersonal, an exercise of balance in an era presided over by pluralism and the radical fragmentation of languages."