“Virtue alone is for real; all else is sham. Talent and greatness depend on virtue, not on fortune. Only virtue is sufficient unto herself. She makes us love the living and remember the dead.”

Che dona e tolle ogn'altro ben Fortuna;
Sol in virtù non ha possanza alcuna.
Canto III, stanza 37 (tr. W. S. Rose)
Orlando Furioso (1532)

1920s, The Prospects of Industrial Civilization (1923)
Context: The governors of the world believe, and have always believed, that virtue can only be taught by teaching falsehood, and that any man who knew the truth would be wicked. I disbelieve this, absolutely and entirely. I believe that love of truth is the basis of all real virtue, and that virtues based upon lies can only do harm.

Lettre sur les aveugles [Letter on the Blind] (1749)
Context: As to all the outward signs that awaken within us feelings of sympathy and compassion, the blind are only affected by crying; I suspect them in general of lacking humanity. What difference is there for a blind man, between a man who is urinating, and man who, without crying out, is bleeding? And we ourselves, do we not cease to commiserate, when the distance or the smallness of the objects in question produce the same effect on us as the lack of sight produces in the blind man? All our virtues depend on the faculty of the senses, and on the degree to which external things affect us. Thus I do not doubt that, except for the fear of punishment, many people would not feel any remorse for killing a man from a distance at which he appeared no larger than a swallow. No more, at any rate, than they would for slaughtering a cow up close. If we feel compassion for a horse that suffers, but if we squash an ant without any scruple, isn’t the same principle at work?

Wolf Hall

Source: The Analects, Chapter IV

Speech to the American Legion convention, New York City (27 August 1952); as quoted in "Democratic Candidate Adlai Stevenson Defines the Nature of Patriotism" in Lend Me Your Ears : Great Speeches In History (2004) by William Safire, p. 81 - 82
Context: It was always accounted a virtue in a man to love his country. With us it is now something more than a virtue. It is a necessity. When an American says that he loves his country, he means not only that he loves the New England hills, the prairies glistening in the sun, the wide and rising plains, the great mountains, and the sea. He means that he loves an inner air, an inner light in which freedom lives and in which a man can draw the breath of self-respect.
Men who have offered their lives for their country know that patriotism is not the fear of something; it is the love of something.

Book XIII, lines 663–665
Punica

L'innocence, le plus souvent, est un bonheur et non pas une vertu.
Les Dieux Ont Soif http://fr.wikisource.org/wiki/Les_Dieux_ont_soif_-_Chapitre_XV [The Gods Are Thirsty] (1912), ch. XV