It is to the young that I wish to speak now. Let the old-I mean of course the old in heart and spirit-put these pages aside without tiring themselves pointlessly by reading something which will tell them nothing. I assume you are about eighteen or twenty; that you are finishing your apprenticeship or your studies; that you are about to enter into life. I imagine you have a mind detached from the superstitions people have tried to inculcate in you; you are in no fear of the Devil and you do not listen to the rantings of priests and parsons. Furthermore I am sure you are not one of those popinjays, the sad products of a society in decline, who parade in the streets with their Mexican trousers and their monkey faces and who already, at their age, are dominated by the appetite for pleasures at any price. I assume, on the contrary, that your heart is in the right place, and it is because of this that I am speaking to you. An urgent question, I know, lies before...