Brunetto Latini

One thing at any rate was known to that time. They knew that man, to reach the secrets of existence, must take the path that leads through his own re-birth. This above all was fully and absolutely living in that time: the recognition that the path to knowledge of the world must necessarily lead through self-knowledge. Self-knowledge, however, must not be thought of in the superficial sense in which people often speak of it today. Who does not think himself able to know about himself? By way of introduction, let me bring home to you with an example, how difficult self-knowledge is even in the most elementary matters. How little a man is inclined to set out for what can truly be called self-knowledge!