"It would be
better to say: strategy is the art of plans of campaign and tactics the art of
battles.
This can serve to open people’s minds and give them a few ideas, but it
cannot teach war. There is too much intellect: there shouldn’t be so much in
war. Perhaps these principles are today’s. War is an affair of the moment: what
was good at midday is no longer so at two o’clock. What can books teach
about that?"