The 20th century began with a critique of stoicism and asceticism, typical of Judeo-Christian ethics. From then on, metaphysics and ethics were developed based on the affirmation of the subject and self-care. In the current era, this has been taken to the extreme, producing the exacerbation of the self, an individualism in which self-care has been interpreted as neglect of the other. Incidentally, it can be observed that abuse, dispossession, rape, extermination are the signs that have marked contemporary times. For this reason, metaphysical reflection on the neighbor is allowed, considering him in his difference, in his singularity, not only as that which marks the limits of the self, as Hegelian philosophy tells us. Likewise, putting into practice an ethic in which the other is someone to whom I cannot be indifferent, but on the contrary, I must be sensitive to his presence. Emmanuel Levinas' philosophy is a proposal that is built around otherness, producing a decentralization of the self. Being is being with the other, and time is transcendence in the next. We are not beings for death, as Heidegger points out, but beings for after our death; what is important is the world that we leave to those who will come after us. Ethics, according to Levinas, must be based on goodness and justice. Goodness generates justice and this must always be kept in mind, because when justice forgets its origin, there is a risk that social systems will produce totalitarian regimes and the ability to invent new forms of expression and human coexistence will be lost. This book is an invitation to read Levinas and to continue thinking about such current issues as goodness, justice, freedom, time, transcendence, all of them directly related to the daily life of our existence.