From The Captive, Marcel discourses on the relative merits of the world of dreams and the real world.
Because the dream world is not the waking world, it does not follow that the waking world is less genuine, far from it. In the world of sleep, our perceptions are so overcharged, each of them increased by a counterpart which doubles its bulk and blinds it to no purpose, that we are not able even to distinguish what is happening in the bewilderment of awakening; was it Françoise that had come to me, or I that, tired of waiting, went to her? Silence at that moment was the only way not to reveal anything, as at the moment when we are brought before a magistrate cognisant of all the charges against us, when we have not been informed of them ourselves. Was it Françoise that had come, was it I that had summoned her? Was it not, indeed, Françoise that had been asleep and I that had just awoken her; nay more, was not Françoise enclosed in my breast, for the distinction between persons and their reaction upon one another barely exists in that murky obscurity in which reality is as little translucent as in the body of a porcupine, and our all but non-existent perception may perhaps furnish an idea of the perception of certain animals. Besides, in the limpid state of unreason that precedes these heavy slumbers, if fragments of wisdom float there luminously, if the names of Taine and George Eliot are not unknown, the waking life does still retain the superiority, inasmuch as it is possible to continue it every morning, whereas it is not possible to continue the dream life every night. But are there perhaps other worlds more real than the waking world? Even if we have seen transformed by every revolution in the arts, and still more, at the same time, by the degree of proficiency and culture that distinguishes an artist from an ignorant fool.