This book provides a detailed account of Julián Marías's metaphysical anthropology with the ultimate aim of offering a coherent and systematic analysis of Marías's argumentation for claiming that the conscious hope for Christian salvation through resurrection — and with it the hope that Jesus Christ did actually resurrect, and more generally the hope that Christian revelation is true — is justified not because the certainty or the likelihood that this salvation will, as a matter of fact, actually occur, but because this hope amounts to a self-affirming exercise, a conscious endorsement of human reality, and as such a sign of authenticity.