Publishing a book on the subject of "philosophy and messianism" can correspond to the purpose of systematizing the different attempts that philosophy has made to approach the varied messianic traditions, or to the attempt to place itself in the middle of this impossible, but above all, untimely. In the first case, we already know what philosophy is and what philosophy can: it pretends to control what it looks at from its recognized altitudes. The messianic traditions are different perspectives on the future world that leave intact the possibility of the knowledge and the attitude of the theoretician. In the second case, between philosophy and messianism is the whole problem of what prefigures, promises or destabilizes such conjunction. Messianism is not confined to an object of study of philosophy but, with respect to the latter, is more like a traveling companion: philosophy and messianism are two ways of thinking and, with some complicity, invite new possibilities for the critic, for the critical attitude that constitutes the philosophical praxis.