"Well," you say, "assume that I am braced for the battle. Assume that I have carefully weighed and comprehended your ponderous remarks; how do I begin?" Dear sir, you simply begin. There is no magic method of beginning. If a man standing on the edge of a swimming-bath and wanting to jump into the cold water should ask you, "How do I begin to jump?" you would merely reply, "Just jump. Take hold of your nerves, and jump."