“Every moment of happiness requires a great amount of Ignorance”

“Behind every great fortune there is a crime.”

“He hesitated till the last moment, but finally dropped them in the box, saying, "I shall win!"--the cry of a gambler, the cry of the great general, the compulsive cry that has ruined more men than it has ever saved.”

“If youth were not ignorant and timid, civilization would be impossible.”

“A murderer is less loathsome to us than a spy. The murderer may have acted on a sudden mad impulse; he may be penitent and amend; but a spy is always a spy, night and day, in bed, at table, as he walks abroad; his vileness pervades every moment of his life”

“There is no such thing as a great talent without great willpower.”

“Some day you will find out that there is far more happiness in another's happiness than in your own.”