VI.
“I am afraid that I have been wandering somewhat from my text; but this digression, though it may at first sight seem out of place, still when one comes to consider it is very closely connected with our subject. For it serves to emphasise once more the fact that, in spite of every probability, luck may always turn the scale in favour of the other side, and to remind you that you cannot attach too much importance to the most minute particulars of your defence.
“Habitual mistrust is one of the most necessary requirements for this complicated art. Put in another way it is the careful study of the enemy whom you have to face. The mistrust that marks the wary, calculating player, not only preserves him from danger but creates dangers for his opponent.