Great events ever depend but upon a single hair. The adroit man profits by everything, neglects nothing which can increase his chances; the less adroit, by sometimes disregarding a single chance, fails in everything.
A commander in chief ought to say to himself several times a day: If the enemy should appear on my front, on my right, on my left, what would I do? And if the question finds him uncertain, he is not well placed, he is not as he should be, and he should remedy it.