Tolstoy pitilessly stips himself before our eyes. There are few writers who show us truths like these. p. 85 - Lev Shestov

How alarming to men, even today, is Protagoras's doctrine that man is the measure of all things! And what efforts human thought makes to kill Protagoras and his teaching! They have stopped at nothing, not even at direct calumny - even men like Socrates, Plato, and Aristotle who loved uprightness and honesty with their whole souls and honestly desired only to serve the truth. They were afraid that if they let Protagoras prevail, they would become misologoi, despisers of reason, that they would commit spiritual suicide. They were afraid: that is the point. But there was no reason to be afraid. p. 166

Thales was the father of ancient philosophy. His consternation, and the firm beliefs to which this gave rise, were transmitted to his pupils and to their pupils again. The law of heredity exercises as despotic and unlimited a sway in philosophy as in all other fields of organic existence. Let any one who doubts this cast a glance at any text-book. Since Hegel no one has dared imagine that the philosopher is able to think and inquire “freely”. The philosopher grows out of the past, like a plant out of the earth. Foreword xxxi

One of the outstanding examples of the unfree character of modern philosophical thought is perhaps the famous dispute between Hume and Kant. Kant often declared that Hume had awakened him out of “dogmatic slumber.” And in fact, when we read Hume and those passages of Kant in which he appeals to Hume, we might think that this could not be otherwise, and that what Hume saw and what was visible to Kant also, after Hume, must have awakened not only a sleeper, but even a dead man. Foreword p. xlv