It seems that a profound, impartial, and absolutely just opinion of our fellow-creatures is utterly unknown. Either we are men, or we are women. Either we are cold, or we are sentimental. Either we are young, or growing old. In any case life is but a procession of shadows, and God knows why it is that we embrace them so eagerly, and see them depart with such anguish, being shadows. And why, if this -- and much more than this is true -- why are we yet surprised in the window corner by a sudden vision that the young man in the chair is of all things in the world the most real, the most solid, the best known to us--why indeed? For the moment after we know nothing about him. Such is the manner of our seeing. Such the conditions of our love.
Recall, then, some event that has left a distinct impression on you---how at the corner of the street, perhaps, you passed two people talking. A tree shook; an electric light danced; the tone of the talk was comic, but also tragic; a whole vision, an entire conception, seemed contained in that moment. But when you attempt to reconstruct it in words, you will find that it breaks into a thousand conflicting impressions.
Therefore I would ask you to write all kinds of books, hesitating at no subject however trivial or however vast. By hook or by crook, I hope that you will possess yourselves of money enough to travel and to idle, to contemplate the future or the past of the world, to dream over books and loiter at street corners and let the line of thought dip deep into the stream.