Out of time and out of space, the novel, based on true events in different historical periods, we propose two therapies in parallel: that of Spinoza, the man who was excommunicated, among others, for demonstrated logically that Moses could not have written a book describing his own death, and Alfred Rosenberg, the Nazi official who could never read a line of Spinoza and understand, as he moved in intellectual confusion total. Two opposite in fact: on one side the rigorous Spinoza, ready to suffer ostracism from the community to which he belonged if that were the price of the quest for truth, and the other very poor Rosenberg, willing to sacrifice any approach a little bit neurotic rational in its aspiration to join the Hitler inner circle. In the background of this book Spinoza's phrase that says so "the strength of faith is irrelevant to its truth" for Spinoza it is a rule of life and Rosenberg antithesis of a lifetime . Through this narrative two courses and their psychic dimensions, excellent Irvin Yalom leads us to discover the part of these two characters is in ourselves, because how can one explain the resonance aroused so often this item?