"A philosopher is a man who compares the knowledge and beliefs of men in order to investigate their relationships; therefore, we want to know how Plato or Leibniz conceived these relationships; Furthermore, since a philosopher is not a seer to whom truth is revealed in a flash, but a patient researcher who reflects, criticises, doubts, hesitates, and surrenders only to obvious reasons, we want to know by what methodical means, by what observations and reasoning our author arrived at his conclusions. For this is not a matter of unconscious and mechanical work of his brain, but of a conscious and deliberate effort to overcome the limits of his own personality, to think universally, and to discover the truth. (Ch. I, p. 7)"