Savage peoples are ruled by passion, civilized peoples by the mind.

War is the realm of uncertainty; three-quarters of the factors on which action in war is based are wrapped in a fog of greater or lesser uncertainty. ... war is the realm of chance. No other human activity gives it greater scope; no other has such incessant and varied dealings with this intruder. Chance makes everything more uncertain and interferes with the whole course of events.

If we do not learn to regard a war, and the separate campaigns of which it is composed, as a chain of linked engagements each leading to the next, but instead succumb to the idea that the capture of certain geographical points or the seizure of undefended provinces are of value in themselves, we are liable to regard them as windfall profits.

We must, therefore, be confident that the general measures we have adopted will produce the results we expect. most important in this connection is the trust which we must have in our lieutenants. consequently, it is important to choose men on whom we can rely and to put aside all other considerations. if we have made appropriate preparations, taking into account all possible misfortunes, so that we shall not be lost immediately if they occur, we must boldly advance into the shadows of uncertainty.

Two qualities are indispensable: first, an intellect that, even in the darkest hour, retains some glimmerings of the inner light which leads to truth; and second, the courage to follow this faint light wherever it may lead.

Knowledge must become capability.

Knowing is different from doing and therefore theory must never be used as norms for a standard, but merely as aids to judgment.