Ronald C. White Jr.

“One day during the siege, Grant was observed walking the outer line when he encountered a mule-team driver beating and cursing one of the mules. He ordered the man to stop. The animal’s abuser, seeing a man with a blouse and no sign of rank, turned and began to swear at him. Grant had the man arrested and brought to his headquarters. Only then did the mule driver realize whom he had insulted. The man was ordered to be tied up by his thumbs. When released, the contrite soldier apologized for his language, telling Grant he did not know to whom he was speaking. Grant explained that he had punished the soldier not because of what he’d said to his commanding general: “I could defend myself, but the mule could not.”
― Ronald C. White Jr., American Ulysses: A Life of Ulysses S. Grant

“After his failed political career, Lincoln often pondered the question of the purpose of the meaning of life. In 1850 [ten years before he was elected President], Lincoln told Herdon [his law partner] "How hard, oh how hard it is to die and leave one's country no better than if one had never lived.”
― Ronald C White