Knowledge must be so absorbed into the mind that it ceases to exist in a separate, objective way. - Carl von Clausewitz

...in war, the advantages and disadvantages of a single action could only be determined by the final balance.

We repeat again: strength of character does not consist solely in having powerful feelings, but in maintaining one’s balance in spite of them. Even with the violence of emotion, judgment and principle must still function like a ship’s compass, which records the slightest variations however rough the sea.

...only a fraction of book learning will seep into practical life anyhow; and the more foolish the theory, the less of it.