Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.

Class VI. Words Relating to the Sentient and Moral Powers
Section IV. Moral Affections
3. Moral Conditions

944. Virtue.

   NOUN:VIRTUE; virtuousness &c. adj.; morality; moral rectitude; integrity (probity) [See Probity]; nobleness [See Repute].
  merit, worth, desert, excellence, credit; self-control (resolution) [See Resolution]; self-denial (temperance) [See Temperance].
  well-doing; good actions, good behavior; discharge -, fulfillment -, performance- of duty; well-spent life; innocence [See Innocence].
  morals; ethics (duty) [See Duty]; cardinal virtues.
  [SCIENCE OF VIRTUE] aretaics (contrasted with eudemonism); aretology.
   VERB:BE VIRTUOUS &c. adj.; practice virtue &c. n.; do -, fulfill -, perform -, discharge- one’s duty; redeem one’s pledge [See Duty]; act well, – one’s part; fight the good fight; acquit oneself well; command -, master- one’s passions; keep in the right path, keep on the straight and narrow way.
  set an example, set a good example; be on one’s -good, – best- behavior.
   ADJECTIVE:VIRTUOUS, good; innocent [See Expedience]; meritorious, deserving, worthy, desertful [rare], correct; dutiful, duteous; moral, right, righteous, right-minded; well-intentioned, creditable, laudable, commendable, praiseworthy; above praise, beyond all praise; excellent, admirable; sterling, pure, noble; whole-souled.
  exemplary; matchless, peerless; saintly, saintlike; heaven-born, angelic, seraphic, godlike.
   ADVERB:VIRTUOUSLY &c. adj.; e merito [L.].
  1. Esse quam videri bonus malebat.—Sallust
  2. Schönheit vergeht Tugend besteht.
  3. Virtue the greatest of all monarchies.—Swift
  4. Virtus laudatur et alget.—Juvenal
  5. Virtus vincit invidiam.
  6. Every noble life leaves the fibre of it in the work of the world.—Ruskin
  7. The nobleness That lovely spirits gather from distress.—Masefield
  8. He had the russet-apple mind That betters as the weathers worsen.—Masefield
  9. Virtue is not the absence of vices or the avoidance of moral dangers; virtue is a vivid and separate thing, like pain or a particular smell.—Chesterton