"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.