"Where is truth, where is reality? Over there at Grichkino, or here on this plain? Grichkino had ceased to exist for ever; must one then doubt the reality of its existence? And with it the reality of the existence of all the old world? Doubt everything? De omnibus dubitandum? But did great Descartes really doubt everything? No, Hume was right: the man who has once doubted all things will never overcome his doubts, he will leave for ever the world common to us all and take refuge in his own particular world. De omnibus dubitandum is useless; it is worse than storm and snow, worse than the fact that Nikita is freezing and that the bay is shivering in the icy wind. p. 131-132"