Several thinkers from different philosophical currents have pointed out that transhumanism is one of the most dangerous contemporary ideologies. After analyzing why a philosopher must pass a warning regarding this way of thinking and living, I offer some critical aspects against this interpretation of human transformation –the main promise of transhumanism–. I identify the philosophical roots of transhumanism above all in authors such as Nietzsche, Descartes, Freud and Marx. This philosophical tradition invoked by transhumanism proposes a certain interpretation of the imaginative faculty. It is there where this transformation into a cyborg fundamentally resides, whose absurd consequences I explain in the existential, scientific and socio-political sphere. I argue that the imaginative act of becoming a cyborg is morally, epistemologically and spiritually opposed to the act of authentic imagination. I offer a critique of this fantasy and argue that transhumanism is overcome through a total conversion of the imagination.